need help please
Thread Starter
Cruising
Joined: Sep 2009
Posts: 12
Likes: 0
From: memphis tn
need help please
ok this is the problem i'm having i have an 89 vette when i start it up in the morning it runs great it idle fine when you give it gas it wants to shut down feels like it is starving for fuel then when you let off the gas it will turn off and will not start until you shoot gas or starting fluid in the intake and then it will run very rough for about 1 minute and shut off this is what i have replaced so far the ecm fuel pump fuel filter fuel pressure regulator plugs wires cap rotor ignition mod egr valve it is not bringing up any codes next on my list would be injector it is the only thing i have not replaced do you guys think this is what it might be
Safety Car
Joined: Jun 2006
Posts: 3,629
Likes: 28
From: FL
Next on your list should be a factory service manual for your 89 if you don't already own one.
If you do, then I suggest following the step by step diagnostic chart for the symptoms you describe to isolate the problem.
You should have learned by now that the random parts replacement theory of auto repair is expensive and ineffective.
If you do, then I suggest following the step by step diagnostic chart for the symptoms you describe to isolate the problem.
You should have learned by now that the random parts replacement theory of auto repair is expensive and ineffective.
Race Director
Joined: Dec 2000
Posts: 17,551
Likes: 26
From: El Paso Texas
ok this is the problem i'm having i have an 89 vette when i start it up in the morning it runs great it idle fine when you give it gas it wants to shut down feels like it is starving for fuel then when you let off the gas it will turn off and will not start until you shoot gas or starting fluid in the intake and then it will run very rough for about 1 minute and shut off this is what i have replaced so far the ecm fuel pump fuel filter fuel pressure regulator plugs wires cap rotor ignition mod egr valve it is not bringing up any codes next on my list would be injector it is the only thing i have not replaced do you guys think this is what it might be
You need to start by testing your fuel pressure. Attach a fuel injection test gauge to the schrader valve on the fuel rail (looks like a tire valve). Turn the key on but don't crank the car. Yes, I know you've already thrown parts at it....now it's time to troubleshoot.
Tell me what the gauge reads. We'll go from there. This should be an easy fix.
Drifting
Joined: Aug 2011
Posts: 1,861
Likes: 1
From: panama panama
Look....no offense, but that gave me a migraine. Punctuation, please.
You need to start by testing your fuel pressure. Attach a fuel injection test gauge to the schrader valve on the fuel rail (looks like a tire valve). Turn the key on but don't crank the car. Yes, I know you've already thrown parts at it....now it's time to troubleshoot.
Tell me what the gauge reads. We'll go from there. This should be an easy fix.
You need to start by testing your fuel pressure. Attach a fuel injection test gauge to the schrader valve on the fuel rail (looks like a tire valve). Turn the key on but don't crank the car. Yes, I know you've already thrown parts at it....now it's time to troubleshoot.
Tell me what the gauge reads. We'll go from there. This should be an easy fix.
because in order to my car to start. I have to open the air to the max. after that I will have to play with the gas pedal into it stady it self in about 5 minutes.
Last edited by hitmanpty; Oct 11, 2011 at 01:04 PM.
Thread Starter
Cruising
Joined: Sep 2009
Posts: 12
Likes: 0
From: memphis tn
plugs/wires /cap/ rotor/ and mod needed to be replaced. the egr was not working. the old fuel pump pressure was only at 12 psi. with the new fuel pump and pressure reg the fuel pressure is with the key on engine off is 47psi. with the engine on it is 44psi. the test on the injectors. number 1 and number 7 are at 8.7 . numbers 2,3,4,5,6 and 8 are at 16.5 so it would seem that i need some injectors . but will 2 injectors cause it not to start . i can see it running rough but for it not to start at all?
Le Mans Master
Joined: Jul 2007
Posts: 5,356
Likes: 2
From: No HOA, New Hampshire
Cruise-In X Veteran
St. Jude Donor '09
plugs/wires /cap/ rotor/ and mod needed to be replaced. the egr was not working. the old fuel pump pressure was only at 12 psi. with the new fuel pump and pressure reg the fuel pressure is with the key on engine off is 47psi. with the engine on it is 44psi. the test on the injectors. number 1 and number 7 are at 8.7 . numbers 2,3,4,5,6 and 8 are at 16.5 so it would seem that i need some injectors . but will 2 injectors cause it not to start . i can see it running rough but for it not to start at all?
Contact Jon@ficinjectors.com for free advice.
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Supporting Vendor
Joined: Mar 2008
Posts: 1,762
Likes: 14
From: Cumming Ga
plugs/wires /cap/ rotor/ and mod needed to be replaced. the egr was not working. the old fuel pump pressure was only at 12 psi. with the new fuel pump and pressure reg the fuel pressure is with the key on engine off is 47psi. with the engine on it is 44psi. the test on the injectors. number 1 and number 7 are at 8.7 . numbers 2,3,4,5,6 and 8 are at 16.5 so it would seem that i need some injectors . but will 2 injectors cause it not to start . i can see it running rough but for it not to start at all?
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Instructor
Joined: Jul 2005
Posts: 177
Likes: 1
From: Hephzibah, GA
St. Jude Donor '13 thru '24
I had almost the same problem with mine, two injectors not reading 16.5 ohms, start but would not run long, replaced all injectors with bosch injectors. Car has been fine since, try unplugging the two bad injectors and start her, she should run but poorly I think I read that in my shop manual just in case you breakdown on the side of road or something. Good luck
Burning Brakes
Joined: Apr 2009
Posts: 877
Likes: 0
From: Broken Arrow Oklahoma
