82 corvette collector
Melting Slicks
Joined: Jul 2005
Posts: 2,740
Likes: 3
From: Aurora Ontario
Jim you are right , But I did check the injectors last night I disconnected them and they did not leak and fuel while cranking the engine. But I already have new injectors on the way both front and rear. I will change them . I too am thinking your way I really dont think it will fix my problem. I am very confused because everything in the system has been replaced, or re-built, (ie) throttle bodies, fuel regulators I even checked the fuel pressure 13 psi . I replaced the CTS, the MAP, the TPS all is set according to specs. I am thinking that if I had a bad ecm the car would not even start.
The car starts fine idles fine at 1200 rpm at cold start when warm, idles at 600 rpm. When i begine to advance the throttle I got a good strong spray from both injectors. I checked the timing its at 6 degrees. The car has run fine with a new crate engine in it for over 2000 miles. I went to work one way 50 mile run with a full tank of gas ran fine . Got back in to go home 50 mile run and it started to brake down. I have checked everything ai can or at least I think I have.
I am begininng to think that maybe its not advancing but I will need to understand that system and see if I can locate a problem that way.....
The car starts fine idles fine at 1200 rpm at cold start when warm, idles at 600 rpm. When i begine to advance the throttle I got a good strong spray from both injectors. I checked the timing its at 6 degrees. The car has run fine with a new crate engine in it for over 2000 miles. I went to work one way 50 mile run with a full tank of gas ran fine . Got back in to go home 50 mile run and it started to brake down. I have checked everything ai can or at least I think I have.
I am begininng to think that maybe its not advancing but I will need to understand that system and see if I can locate a problem that way.....
I see you checked the pressure between the TBI's. I was going to suggest that. In the back of my mind I was wondering if you rebuilt the regulator (rear TBI) and compensator (front TBI) correctly. 13 psi answers the question....sounds good.
I though maybe you threw out the TBI's by toying with them but the car would not have run right for 2000 miles.
You can check to see if the advance is working by disconnecting the tan wire. Do it while the car is running. you should notice a difference in RPM.
I would also try disconnecting the cts and see if taking it out of the equation makes a difference. The system should go to a default setting.
I also remember having a problem with the TPS connector. My reading was perfect but the connection was bad. Wiggling the connector seemed to make a difference..which it shouldn't. I would check that as well.
Lastly all the wires you see coming from the TBI's,CTS,TPS etc go to a box on the passengerside firewall. That box contains several large connectors. The wiring continues on to the ECM from there. I had a corrosion problem in there that caused all kinds of problems. I would open that up and clean them. A bad signal to the injectors could be caused by something in those connections.
Jim
Le Mans Master
Joined: Jul 2000
Posts: 6,664
Likes: 162
From: columbia city in
Ok let me bring you up to date I found a web site that has plenty of injectors for the crossfire, they are remanufactured. i paid 129.00 for each one and they will be here if I am luck friday. I set the TPS at.0575 I believe is what the instruction said + or - 0.75. Its right on the money. I had no problem setting it up. I also installed a new MAP sensor as well. Still have same problem Car starts up fine idles fine but as soon as you crak the throttle it load up and stalls out. I am not getting any check engine light. With a scanner on it while running it was clean. Of course after you adjust the TPS you disconnect the battery to clear codes then you reconnect and start the the engine all was well.. Thsi is just unbelievable, after the injectors there is nothing left for me to do . I have changed every part . This is a brand new engine with all new components I have everything new in that damn engine cmpartment and I can get it to run., I have ran every test i know . I got 2000 mile on the new engine and it ran fine. no problems. Drove car to wrok with full tank of gas. Went home (60Z) mile run burned a tank of gas and it started to brake down. Changed o2 sensor, coolant sensor, no check engine lights then, Rebuilt both throttle bodies one at a time so there was no mixup. Rebuilt fuel regualtors, New ECM, the only thing I did not vhange was the injectors. So thats where I am now.
For the person that asked about my hinges yes I did get them from Steve .worth every penny I paid he is awsome.!!!At least my hatch works great!!!!!!!!
PS call 1-800-685-1925 Ext 107 and ask for Dave http://www.fuelinjectorsdirect.com/ they are out of Jacksonvill Fla........for the injectors
For the person that asked about my hinges yes I did get them from Steve .worth every penny I paid he is awsome.!!!At least my hatch works great!!!!!!!!
PS call 1-800-685-1925 Ext 107 and ask for Dave http://www.fuelinjectorsdirect.com/ they are out of Jacksonvill Fla........for the injectors
Thread Starter
Racer
Joined: Apr 2006
Posts: 373
Likes: 0
From: Chipley Florida
Le Mans Master
Joined: Jan 2000
Posts: 8,918
Likes: 27
From: New Hill NC
Just thinking of things here. I had one the other day a TPI that made me pull my hair out. After hours of checking and rechecking I had come to the end of my rope. It would idle perfectly and ran fine sitting in the yard. But if I took it out, it came back all out of adjustment. Re-set and go through the same thing over and over. On the scanner I was seeing a change in the TPS sensor at idle. I knew that two new TPS had been put on the car, by the owner and a GM mechanic, so I was relatively sure that it was good. After letting the smoke clear over night, I thought, That is not possible, the TPS sensor should always be the same at idle. So I decided to check it with my VOM. The reading was solid as a rock, at the same time the scanner reading was changing. So, I had a condition that the sensor was correct, but the computer was seeing a different reading. The wiring was correct, so that only leaves the computer. The damn computer was plugging its own number. New computer solved the problem.
Le Mans Master
Joined: Jan 2000
Posts: 8,918
Likes: 27
From: New Hill NC
I wasnt really suggesting that the computer was bad. I know you have changed it, but are your SURE that the changed one is good? My point is that a systematic check on components will finnally solve this problem, and that a physical check is not enough, if the computer is plugging in its own numbers.
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Thread Starter
Racer
Joined: Apr 2006
Posts: 373
Likes: 0
From: Chipley Florida
Thread Starter
Racer
Joined: Apr 2006
Posts: 373
Likes: 0
From: Chipley Florida
fuel loading up
I wasnt really suggesting that the computer was bad. I know you have changed it, but are your SURE that the changed one is good? My point is that a systematic check on components will finnally solve this problem, and that a physical check is not enough, if the computer is plugging in its own numbers.
But I did order another ECM just in case....If the other is bad I can still turn it in so thats not a problem.
One thing I have learnd about these computers is they really dont tell you very much.......They are not like the newer cars today. But again I am suspect to think that the computer is bad, simple if it was not working at all I would hope to flash some kind of code but I am not flashing anything .
Last edited by warrior2291; Feb 19, 2007 at 12:17 PM.
Melting Slicks
Joined: Jul 2005
Posts: 2,740
Likes: 3
From: Aurora Ontario
I have replaced about everything that can be replaced with the exception of the injectors they are on the way should have them tomorrow.
But I did order another ECM just in case....If the other is bad I can still turn it in so thats not a problem.
One thing I have learnd about these computers is they really dont tell you very much.......They are not like the newer cars today. But again I am suspect to think that the computer is bad, simple if it was not working at all I would hope to flash some kind of code but I am not flashing anything .
But I did order another ECM just in case....If the other is bad I can still turn it in so thats not a problem.
One thing I have learnd about these computers is they really dont tell you very much.......They are not like the newer cars today. But again I am suspect to think that the computer is bad, simple if it was not working at all I would hope to flash some kind of code but I am not flashing anything .
I have also learned that when replacing parts with new does not always mean they are good.
Wait for the injectors...one more thing to take out of the equation.
Jim
Burning Brakes
Joined: Jan 2006
Posts: 1,154
Likes: 1
From: St Augustine FL
Mine flashed nothing. I had an expert up here look at it. Someone GM suggested. I'm not sure what the test was but it was conclusive that it was bad. Once replaced odd occational symptoms disappeared. I'm not saying your is bad. But it is possible.
I have also learned that when replacing parts with new does not always mean they are good.
Wait for the injectors...one more thing to take out of the equation.
Jim
I have also learned that when replacing parts with new does not always mean they are good.
Wait for the injectors...one more thing to take out of the equation.
Jim
Thread Starter
Racer
Joined: Apr 2006
Posts: 373
Likes: 0
From: Chipley Florida
fuel loading up
Well I finailly got my injectors in last night I will install them today I am waitng for another new ECM and I will let everyone know how it turns out.
Just wanted to let the person know who asked me about the TPS, I went back and rechecked it its on the money pefect with no problems at this time.
Hi everyone I changed the injectors and they really make a difference. I can tell the spray pattern is perfect now. Also I need to change the plugs, it would not start but that probably because of all the fuel that was dumping before. After I chang the plugs I will try it and then go from there. My new ECM should be in Monday so I have that ready if I need it...........will let you know how eveything turns out next week. This weekend is a busy one for me.
Just wanted to let the person know who asked me about the TPS, I went back and rechecked it its on the money pefect with no problems at this time.
Hi everyone I changed the injectors and they really make a difference. I can tell the spray pattern is perfect now. Also I need to change the plugs, it would not start but that probably because of all the fuel that was dumping before. After I chang the plugs I will try it and then go from there. My new ECM should be in Monday so I have that ready if I need it...........will let you know how eveything turns out next week. This weekend is a busy one for me.
Last edited by warrior2291; Feb 23, 2007 at 06:45 PM.
Thread Starter
Racer
Joined: Apr 2006
Posts: 373
Likes: 0
From: Chipley Florida
fuel loading up
To the person that told me it would be something stuipd I think you were right.
First I put a new computer in the car and new injectors. Everything is wroking perfectly. With on problem its still loading up with fuel. when you crack the throttle.
More trouble shooting in the distributor ahs revealed the problem. I have attached a picture of where my problem is. I need a harnesss for the distributor. Looking in the helms service book on page6D-33 bottom right hand picture is a harness this harness connects to the module, the little piece of plastic is broken. It appears that when you crack the throttle It is not getting the signal to advance the timming.
Now I have called every GM dealer I know and I have gone to all the local places like Nappa, Advance auto etc and no one carries it. I was wondering if any one here has changed their engines over and maybe still has the distributor or this harness. Iwill pay for all shiiping and buy it from you if you have it. Or does anyone know a place I might be able to get on. I have looked an e-bay and they have a 1982 corvette originial distrubitor its item numbewr 8021741577, not sure if that piece is with it but it looks like it is was wondering if a second set of eyes could conform it for me.
First I put a new computer in the car and new injectors. Everything is wroking perfectly. With on problem its still loading up with fuel. when you crack the throttle.
More trouble shooting in the distributor ahs revealed the problem. I have attached a picture of where my problem is. I need a harnesss for the distributor. Looking in the helms service book on page6D-33 bottom right hand picture is a harness this harness connects to the module, the little piece of plastic is broken. It appears that when you crack the throttle It is not getting the signal to advance the timming.
Now I have called every GM dealer I know and I have gone to all the local places like Nappa, Advance auto etc and no one carries it. I was wondering if any one here has changed their engines over and maybe still has the distributor or this harness. Iwill pay for all shiiping and buy it from you if you have it. Or does anyone know a place I might be able to get on. I have looked an e-bay and they have a 1982 corvette originial distrubitor its item numbewr 8021741577, not sure if that piece is with it but it looks like it is was wondering if a second set of eyes could conform it for me.
Burning Brakes
Joined: Jan 2006
Posts: 1,154
Likes: 1
From: St Augustine FL
To the person that told me it would be something stuipd I think you were right.
First I put a new computer in the car and new injectors. Everything is wroking perfectly. With on problem its still loading up with fuel. when you crack the throttle.
More trouble shooting in the distributor ahs revealed the problem. I have attached a picture of where my problem is. I need a harnesss for the distributor. Looking in the helms service book on page6D-33 bottom right hand picture is a harness this harness connects to the module, the little piece of plastic is broken. It appears that when you crack the throttle It is not getting the signal to advance the timming.
Now I have called every GM dealer I know and I have gone to all the local places like Nappa, Advance auto etc and no one carries it. I was wondering if any one here has changed their engines over and maybe still has the distributor or this harness. Iwill pay for all shiiping and buy it from you if you have it. Or does anyone know a place I might be able to get on. I have looked an e-bay and they have a 1982 corvette originial distrubitor its item numbewr 8021741577, not sure if that piece is with it but it looks like it is was wondering if a second set of eyes could conform it for me.
First I put a new computer in the car and new injectors. Everything is wroking perfectly. With on problem its still loading up with fuel. when you crack the throttle.
More trouble shooting in the distributor ahs revealed the problem. I have attached a picture of where my problem is. I need a harnesss for the distributor. Looking in the helms service book on page6D-33 bottom right hand picture is a harness this harness connects to the module, the little piece of plastic is broken. It appears that when you crack the throttle It is not getting the signal to advance the timming.
Now I have called every GM dealer I know and I have gone to all the local places like Nappa, Advance auto etc and no one carries it. I was wondering if any one here has changed their engines over and maybe still has the distributor or this harness. Iwill pay for all shiiping and buy it from you if you have it. Or does anyone know a place I might be able to get on. I have looked an e-bay and they have a 1982 corvette originial distrubitor its item numbewr 8021741577, not sure if that piece is with it but it looks like it is was wondering if a second set of eyes could conform it for me.
Last edited by bluesilver82; Feb 26, 2007 at 01:16 PM.
Le Mans Master
Joined: Dec 2006
Posts: 8,837
Likes: 1,028
To the person that told me it would be something stuipd I think you were right.
First I put a new computer in the car and new injectors. Everything is wroking perfectly. With on problem its still loading up with fuel. when you crack the throttle.
More trouble shooting in the distributor ahs revealed the problem. I have attached a picture of where my problem is. I need a harnesss for the distributor. Looking in the helms service book on page6D-33 bottom right hand picture is a harness this harness connects to the module, the little piece of plastic is broken. It appears that when you crack the throttle It is not getting the signal to advance the timming.
Now I have called every GM dealer I know and I have gone to all the local places like Nappa, Advance auto etc and no one carries it. I was wondering if any one here has changed their engines over and maybe still has the distributor or this harness. Iwill pay for all shiiping and buy it from you if you have it. Or does anyone know a place I might be able to get on. I have looked an e-bay and they have a 1982 corvette originial distrubitor its item numbewr 8021741577, not sure if that piece is with it but it looks like it is was wondering if a second set of eyes could conform it for me.
First I put a new computer in the car and new injectors. Everything is wroking perfectly. With on problem its still loading up with fuel. when you crack the throttle.
More trouble shooting in the distributor ahs revealed the problem. I have attached a picture of where my problem is. I need a harnesss for the distributor. Looking in the helms service book on page6D-33 bottom right hand picture is a harness this harness connects to the module, the little piece of plastic is broken. It appears that when you crack the throttle It is not getting the signal to advance the timming.
Now I have called every GM dealer I know and I have gone to all the local places like Nappa, Advance auto etc and no one carries it. I was wondering if any one here has changed their engines over and maybe still has the distributor or this harness. Iwill pay for all shiiping and buy it from you if you have it. Or does anyone know a place I might be able to get on. I have looked an e-bay and they have a 1982 corvette originial distrubitor its item numbewr 8021741577, not sure if that piece is with it but it looks like it is was wondering if a second set of eyes could conform it for me.
Thread Starter
Racer
Joined: Apr 2006
Posts: 373
Likes: 0
From: Chipley Florida
fuel loading up
Jim I called 5 differnent dealers for GM products they say its no carried and discontinued. When I wen to the parts store they only sell the module, it does not come with that plug. The one I am looking for is at the bottom it sits inside the distributorthe little piec of plastic is broken in the distributor where it scres down