Well guys I'm thinking about givin up on this car I just can't seem to get it to run right I'm stumped and think I'm in overu head that being said anyone wanna buy a 84 crossfire that needs work let me know

 

I don't know what your mechanical strengths are, so excuse my asking. Have you had it to a professional mechanic for diagnosis or repairs yet? These cars are usually relatively easy to repair and keep running good.

 

Dude you havent even been here a month yet. If you had read the rules you need to waste thousands of dollars and hundreds of hours before you give up. Its best just to find someone in your area that knows corvettes and would be willing to help you out. It is Ok to ask for help.

 

I agree with txbobcat, don't just give up on it yet. Is this your first corvette or first C4? If it is you'll be amazed at how well it can perform and handle and the amount of pleasure you'll get out of just going for a drive is well worth the troubles you are having right now. Any car clubs in the area? Trusted mechanic or friend that can lend a hand? Seek and ye shall find

astepup said that

 

So whats wrong with it? As in what is it doing or not doing?

 

Take some time off and come back to it later. During that time period purchase a repair manual such as this:
http://www.ebay.com/itm/1984-Chevrolet-Corvette-Shop-Service-Repair-Manual-CD-Engine-Drivetrain-Wiring-/140815099233?pt=Motors_Car_Truck_Parts_Accessories&fits=Year%3A1984%7CModel%3ACorvette&hash=item20c93be561&vxp=mtr
Then make a list of the problems and fix one problem at a time. If you run into a snag then ask here or in the C4 technical section. There is someone (even several someones) who have done the repair and will pass on their knowledge.
If you are unable to fix something then there are professionals out there who can do it for you.
The rewards are many and some day you will be the expert who helps others.

 

What? Over? Did you say "over"? Nothing is over until we decide it is! Was it over when the Germans bombed Pearl Harbor? Hell no!

Anybody want to finish it?

 

I've been in this forum for 11 years, and have seen this around 75 times. This is what happens when you choose to buy a cheap 84 Vette instead of buying a $14,000+ 96 Vette.


There is nothing to become co$t effective about buying a cheap 30 year old car. I bet there are 84s out there that had been properly maintained, and they still great cars today, but not every Vette owner is a car person.

 

I bought the car already having problems only code was 51 prom error I replace the ecm and the prom and got code22 tried to adjust the tps and then got code 21 adjust again no codes tried to check voltage jumped top two wires got .09 at idle and .000 wot and can't get even close to right the car is running great sittin in the driveway can even rev it out good and everything seems ok but then dies and spits and sputters when driving seems to only happen when I get in it to much because it will start spinning the tires getting sideways and then spits sputters and dies its hard to start after this but once it starts you can kill it start it right up kill it start it right up no problems until you go to drive again then it drives ok as long as I am babying the throttle if I get on it at all it dies again

 

Germans??? Is that why you don't drive a Mercedes? Back to school for you! It was the Japanese that bombed Pearl Harbor!! (Or is this just a joke?)

My "cheap" '84 is a ton of fun!! I've only got 240,000 miles on it, and it runs like a dream!

PLRX Pete, when are we going to do another fun mountain cruise?

 

[QUOTE=PLRX;1585931015] This is what happens when you choose to buy a cheap 84 Vette instead of buying a $14,000+ 96 Vette.


I knew it wouldn't be long before something like this showed up.

 

LOL Spin the tires side ways? Man you got a good car. Check your fuel pressure sound like the pump is not keeping up and it sounds like the ecm is fixed. you may need to replace the TPS but what is the other voltage at the tps I ( example do you have five volts out that and a good ground and your reference voltage is correct at .09?)
that is just an example I don't know exactly what your tps is suppose to read but the info is on the forum somewhere. I just sounds like a fuel supply problem. It also sounds like you have had some success. Just remember this " CAN'T NEVER COULD and WON'T NEVER WILL" also BOURBON IS always a good fix!

 

11 years and still don't see how learning to fix your own car is not cost effective? Do you fix your own stuff yet I mean I don't have a PHD in auto repair but the only thing I pay for is alignments and tire mount and balance. So fixing my own jalopies is very cost effective, frustrating, and fun! Whiskey does help once in awhile!

 

I stopped planning the runs. There is time, and money into planning, a lot of people posting the usual "great", "I wish I could go", "I'll be there", and 2 Vettes would show. On the last run one of the two bitched about the route being too long. Nobody forces anyone to do the whole thing, if you are tired or bored go home.

It was fun while it lasted.





...and to the one asking, do a search before you ever ask me if I do my DIY.

 

Oy vey The best Belushi quote ever, Animal house.

 

Ya post at 2:20 about your issues...then by 3:00, you start another thread in which you've given up all hope?? Yikes.

 

first thing by your post it appears you tries to adjust the tps wrong. As others have said one step at a time. 84 were the basics of what was to come in vehicle electronics for amreican car manfactures. With that being said they are way simple by today standards to fix. If you think you are over your head call a grage or repair shop in your area tell them what you have ask them how much to give you a dianoise on it. How old is your fuel? fuel filter? everyone wants to jump to the comp and sensors ect and forget about the basics. did you check the base gaskets for your tbi units these thinngs were known for blowing out best bet for that is just spend the 15 bucks loosen them up and replace them. The reason I say that if you loosen to check them they have a tentency to come apart. sorry this is running together just typing as it hits me

 

Okay, it sounds like most of this is in the TPS. You have to adjust it properly. Okay, lets go over a few basics.

For the wires to the TPS.

- One wire should have 12 volts
- One wire should have ground
- One wire should have 5 volts

Measure these with the connector unplugged. This is the traditional TPS type set up.

Okay, grab yourself an ohmmeter, and measure the resistance value of the TPS, you will need to place the leads of the meter on the terminal for 5 volts, and the terminal for ground on the sensor. Remove the sensor for this procedure.

Now that you have it off, you are looking to get a reading. Your highest reading should be when you are not moving the slider. Your lowest reading should be when you move the slider to it's fully extended position. This test is called a throttle sweep test. Slowly move the slider while watching the ohmmeter, move it all the way up, and all the way back down. Take your time, this test is tedious as your meter cannot process the readings fast enough. Do this sweep a few times. If you come to a spot where the ohmmeter has an out-of-limits reading, or infinite resistance, or no reading or something along the lines of that, there is a dead spot in the sensor and it needs to be replaced.

If you have no dead spots, the sensor should be good.

On my car, there are two elongated holes on the TPS, my car is a 1985. Yours is probably similar. Loosen the bolts, you want a little bit of drag.

Poke a hole into the 5 volt wire using the lead of a voltmeter, place the other lead to battery ground. The engine should be running for this procedure. You are setting the TPS voltage now.

On my car, the closed throttle voltage is .54 volts. I believe someone said that your car is .52 volts. Move the TPS until you get to .52 volts, carefully, and I mean CAREFULLY, tighten one of the bolts, and recheck the voltage, if it moved away from .52 volts, do it again, if it is still .52 volts, carefully tighten the other bolt. Now check it again, if it is .52 volts then you have completed the procedure, if it changed, you must do it again. You can safely have a voltage reading of 0.520 - 0.529 volts.

Clear your check engine light and try again. Now that you have set the TPS properly, if your check engine light comes on again, the next step would be to test continuity in the wires going to the TPS. It should be no more than 0.2 ohms.

Don't give up, you can do it, take a deep breath and relax. All your answers are on this forum, all you have to do it ask.

 

Ok I've tried this many times now with no success so I check the plug disconnected I get 4.9 volts on the top wire nothing on the middle wire and .03 on the bottom wire when I hook back up and jump the top to wires like I've been told I get .9v when I open the arm on the tps I read .0 volts

 

You say you "jump" the top 2 wires??? If you read We Gone's link post #10 in your TPS thread you would know how to check the TPS.. You connect one lead of the meter to the bottom wire and the other lead to the middle wire.. Also on the 84 there is NO wire with 12v on it, there is only the 5v reference signal on C, A is the reference return to the ECM and B is the TPS input..