Rough running 89
#1
Rough running 89
My 89 has 120k on it. Today it developed a low rpm stumble with a rough idle (in gear). In park, when you slowly advance the rpms, it clears up right at 3000, and seems to run smooth then. When driving around the hood, it's definitely noticeable.
I suspected a faulty MAF a couple years ago (rough idle, but not like this), but never replaced it. It's really only been intermittently noticeable, mostly during the summer with the A/C running.
Also, I did replace the injectors a few years ago with new Bosch ones (about 45k ago)- I'm wondering if an injector is bad again?? How can you troubleshoot injectors to see if a cylinder is making power?
Any ideas?
Thanks for the input.
I suspected a faulty MAF a couple years ago (rough idle, but not like this), but never replaced it. It's really only been intermittently noticeable, mostly during the summer with the A/C running.
Also, I did replace the injectors a few years ago with new Bosch ones (about 45k ago)- I'm wondering if an injector is bad again?? How can you troubleshoot injectors to see if a cylinder is making power?
Any ideas?
Thanks for the input.
#5
Originally Posted by 89maxaz
Also, I did replace the injectors a few years ago with new Bosch ones (about 45k ago)- I'm wondering if an injector is bad again?? How can you troubleshoot injectors to see if a cylinder is making power?
#9
I don't think it's an exhaust issue- the exhaust system is stock, and it sounds perfectly fine. I don't hear any excess noise under the hood either. Thanks for the injector t-shooting tips. I'm going to try that today...
#10
I am experiencing the same problems and I can tell you that it is not the manifold since I got mine repaired a month ago and the problem still remains. I assume it is the injectors since when I use higher octane gas it does not do it as much. I will wait a while and fix this over the summer as it is still cold here in Quebec.
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