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.
- 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.
possible the fuel regulator valve at the end of the fuel manifold is not holding sufficient pressure. have a pressure check done to eliminate that problem check that one of the codes is not for faulty injectors
I knew someone with a 92 Lumina who had the same problem and it turned out to be a bad fuel pump. If she has had the car for a long time and never had it changed, then it's definitely a good place to start. If the filter hasn't been changed in a while or possibly ever, then it should be changed. When it's a fuel related problem, it's usually worse when the engine is cold. If it's a catalytic converter problem, then it usually gets worse the longer you drive it. Fuel system problems are usually checked with a fuel pressure gauge. the injectors must have a constant supply of fuel delivered at a certain pressure at all times for proper engine operation. Catalytic converter problems can be checked by removing the converter and installing a test pipe. If the problem goes away, then the converter should be replaced. I hope this information has been helpful.
The first thing I would check is the engine coolant temperture sensor. Check for codes. Check the air and fuel filters. All of these will cause your symptoms. Let me know and we can go from there
Randy
The possibilities are endless. do a compression check on the cylinders and see if your dropping a cylinder. If so this could be a valve sticking, bad head gasket, cracked cylinder wall (Where I would really start looking). Your symptom, by your description, starts after the vehicle has warmed up which tells me it is something that is small that gets bigger as it heats up.
im assuming that changed the oil unit you mean sending unit ? if so could be electric short in the pick tail or worse wiring harness. second there is also possoble vacum leak .third while unit was being replaced something didnt get put back or got knocked loose. created a new problem. most times as thing are going bad they dont register until it is a prolonged problem as it took 2 days for the check engine to go out that also might have been normal. you might also notice while sitting at park when you turn the wheel you will notice ia differance in the idle, if its almost stalling then its probley your idle,needs re set, or your idle controle valve is going bad ,did it get checked or cleaned when they serviced the throttle body. and also could be your mass air flow sensor going bad or need cleaned
First, check your air filter so see if it is clogged with dirt. Then inspect the big plastic tubes that go from your air filter to your mass airflow sensor and from there up to the throttle body. If any tube is loose or cracked (look at the undersides of the tubes as well), you will get hesitation and possibly a check engine light.
There are an array of other possibilities, such as fuel pressure problems, but most of them are difficult for an owner to diagnose.
The good news is that it should still be under emissions system warranty if it has less than 50k miles on it.
I recommend a trans fluid and filter change first. It definately sounds like the problem is in the trans. If it was any sort of engine component you would have had a check engine light on.
×