At Fixya.com, our trusted experts are meticulously vetted and possess extensive experience in their respective fields. Backed by a community of knowledgeable professionals, our platform ensures that the solutions provided are thoroughly researched and validated.
1989 corvette runs rough surges between 600 and 700 rpm. drive it for 20 minutes it totally runs awful. had to have it towed the other day..waited two hour for flatbed started car and it ran again..code 44 shows on computer..mechanic says o2s is not the problem..repaced maf and fuel pump. car still runs and quits the same way...help...no other codes on computer...
Re: 1989 corvette runs rough surges between 600 and 700...
Try replacing the fuel regulator,that would make it get too much fuel and the code for o2 sensor will come on saying too lean or too rich fuel mixture,and it would run rough
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
The check engine light should be on and when it is the engine controls are in Limp mode. That means the computer is using a pre-set list of settings to try to keep the engine running long enough to get the car to a shop. You need to get the problem with the MAP sensor fixed and get the light turned off.
Just my opinion but it sounds like a fuel pump issue. When the pump gets hot it stops and after you tow it in it has cooled off by then. Tell someone to check the fuel system first. IE: fuel pressure.
I just recently have been fighting the same problem with the same make/model/year vehicle. For myself, I would drive off and on through the day and it would run fine. Then suddenly after a start it would run rough and die. I would have to wait 20 to 60 mins before it would start again. I had it checked and fuel pump was only putting out around 19 psi. It should be around 41 psi. Had fuel pump replaced and no more problems. Furthermore, now it runs so much better. It's funny how over time I didn't notice how the performance was slowly degrading. Unfortunaley fuel pumps for this car run around $300.
The cam or crank sensor is going out when driving at high speeds. I would have those parts check, and have the fuel pressure check , fuel filter change to be on the safe side.
this sounds similar to a problem i had.
as the rpm went over 2000 the engine would stop for a split second and then kick back in.
after a few days looking my garage finally found the problem was a faulty air mass meter.
this cost me £200 in total to be repaired.
×