1989 C4 Corvette engine stalls HELP! - Corvette Forum : DigitalCorvettes.com Corvette Forums
 
 
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Old 11-02-2013, 03:15 PM   #1
jfd1953
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1989 C4 Corvette engine stalls HELP!

Need advice. I have a 1989 Corvette C4 L98. 43K original miles. Car will run like a champ then all of a sudden miss sputter and die like it is out of gas. Service engine light comes on. I have replaced the fuel pump, fuel filter, new fuel injectors, new VATS module, new plugs, plug wires, distributor etc. Using only premium gas with fuel cleaner at every fill up.

Sometimes the car will start back up after sitting awhile. Sometimes it takes several hours before it will start back up. When it is running it runs great. Then bang it starts missing and acts as if it is out of gas. No fluid leaks what so ever. The cooling fan will run when the AC is on but does not come on when temp is over 200 and AC is not on.

Pulling my hair out trying to figure out what is going on. This is my first Corvette. Anyone have any ideas? Anyone know of an experienced C4 Corvette mechanic in the Dallas Fort Worth area?

I really appreciate your help and input.

Thanks.

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Old 11-02-2013, 04:26 PM   #2
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Fuel pump relay, maybe? Once it warms up under the hood, it might cause your problem.

If you are planning on keeping thing car and doing your own work, getting the full size factory service manual is a must. It will save you from guessing and buying unnecessary parts.

As far as the fans, in stock form, it won't come on until like 235* with the A/C off. Thats too hot for me, so I installed a switch to manually control it from the cockpit.

Enjoy the vette. These C4's are a BLAST.
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Old 11-02-2013, 04:35 PM   #3
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Pull up any Flash codes with a paperclip.
Or use a scanner to check for set codes.
Is the Security Light on sometimes ?

Replaced distributor ?
Install a remaned or used unit ?
Stock ignition module or new with replacment distributor?
Sure base ignition timing set correct?
Who's injectors now used?

Grumpys website has real nice troubleshooting reading for new C4 owners.
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Old 11-02-2013, 06:24 PM   #4
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Quote:
Originally Posted by jfd1953 View Post
Service engine light comes on.
Pulling my hair out trying to figure out what is going on.
Anyone have any ideas?
The computer is telling you it has problems , you are supposed to look at the fault codes to see what is up

Read
http://www.corvettephotographs.com/c4vettes/codes.htm
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Old 11-02-2013, 06:29 PM   #5
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Quote:
Originally Posted by jfd1953 View Post
new VATS module
VATS has no effect on engine operation ; only prevents the engine starting


Quote:
Originally Posted by jfd1953 View Post
The cooling fan will run when the AC is on but does not come on when temp is over 200 and AC is not on.
Perfectly normal operation.

The main fan is not programmed to turn on until 228 F
However the fan will run with the A/c on at any engine temp , even cold
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Old 11-02-2013, 06:47 PM   #6
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Originally Posted by vetteoz View Post
The computer is telling you it has problems , you are supposed to look at the fault codes to see what is up

Read
http://www.corvettephotographs.com/c4vettes/codes.htm
If the car stalls, the Service Light will come on no matter what. But yes, checking for codes is also a good idea.
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