Problems 1985 Corvette
Thread Starter
4th Gear
Joined: Jun 2009
Posts: 4
Likes: 0
Problems 1985 Corvette
My name is Shandre, i am from Aruba. I own a 1985 corvette (C4) which is giving me a lot of headache recently. The car isn't a daily driver but ran like a champ.
The problem:
Out of nowhere the car begins to idle rich won't rev up if i hit the throttle. If the car is cold the car would run (won't rev up) and when it's hot it won't run at all. We have run a diagnostic and it says NO ERROR CODES.
Does anyone have an idea of what it could be?
The problem:
Out of nowhere the car begins to idle rich won't rev up if i hit the throttle. If the car is cold the car would run (won't rev up) and when it's hot it won't run at all. We have run a diagnostic and it says NO ERROR CODES.
Does anyone have an idea of what it could be?
Last edited by ShanAruba; Jun 21, 2009 at 02:06 AM.
Thread Starter
4th Gear
Joined: Jun 2009
Posts: 4
Likes: 0
Thread Starter
4th Gear
Joined: Jun 2009
Posts: 4
Likes: 0
Drifting
Joined: Feb 2008
Posts: 1,267
Likes: 27
From: Texas
On a side note check your Idle control valve
mines spring was busted and that compounded with the fp going out made all my problems
Team Owner
Joined: Feb 2006
Posts: 24,460
Likes: 7
From: sw Ohio
with others, it sounds fuel related. Check your injectors and testing the ohms. Pull the electrical plugs and put leads on the contacts and see what you get. A healthy injector should read about 16 ohms. Anything drastically less is a bad injector and could be leaking causing it to run rich. Agent 86 also has a good idea, its likely the rubber diaphragm inside the regulator is deteriorated and could be leaking. The stock one in my '85 was leaking like this not long after I bought it.
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Burning Brakes
Joined: Apr 2004
Posts: 762
Likes: 2
From: Huntington ma
Not to be disagreeable, but..
What's the One component that will function OK when cold, deteriorate to completely inoperative when hot (if it's dying), will limit RPM and cause misfire at idle, has Nothing to do with fuel and is Not part of the ECM diagnostics (no code will set, at least in an OBD1 system).
Answer - the ignition coil.
I'm just saying..
What's the One component that will function OK when cold, deteriorate to completely inoperative when hot (if it's dying), will limit RPM and cause misfire at idle, has Nothing to do with fuel and is Not part of the ECM diagnostics (no code will set, at least in an OBD1 system).
Answer - the ignition coil.
I'm just saying..
Instructor
Joined: Mar 2009
Posts: 132
Likes: 0
From: Cumana
http://forums.corvetteforum.com/c4-t...t-got-hit.html
Shandre check out this page.
Look for the diagram
Shandre check out this page.
Look for the diagram
Racer
Joined: Jun 2006
Posts: 477
Likes: 1
From: Jefferson Georgia
Not to be disagreeable, but..
What's the One component that will function OK when cold, deteriorate to completely inoperative when hot (if it's dying), will limit RPM and cause misfire at idle, has Nothing to do with fuel and is Not part of the ECM diagnostics (no code will set, at least in an OBD1 system).
Answer - the ignition coil.
I'm just saying..
What's the One component that will function OK when cold, deteriorate to completely inoperative when hot (if it's dying), will limit RPM and cause misfire at idle, has Nothing to do with fuel and is Not part of the ECM diagnostics (no code will set, at least in an OBD1 system).
Answer - the ignition coil.
I'm just saying..
Just had it happen to me! Also had similar problem and it was the oxygen sensor, never set codes.
Thread Starter
4th Gear
Joined: Jun 2009
Posts: 4
Likes: 0
Well, today we have checked the fp and everything seems to be working fine.
One thing that i've noticed is that the burnoff relay was missing, also i get a 5V on signal wire e.g. water temperature sensor (yellow wire), the middle wire of the TPS
I am afraid that the ECM is burned or that there is a shortage in the circuit,
any ideas?
One thing that i've noticed is that the burnoff relay was missing, also i get a 5V on signal wire e.g. water temperature sensor (yellow wire), the middle wire of the TPS
I am afraid that the ECM is burned or that there is a shortage in the circuit,
any ideas?