89 2.5 Engine Trouble
I have some questions regarding an 89 2.5 liter. It seems my engine has a missing problem. It misses at idle and at lower revs only. The problem happens at random intervals, but mostly when the engine is hot. Also, during the time when it's missing, it idles high (about 1250 rpm.) I've changed the plugs, wires, cap, and rotor. Also, I've replaced every vacuum line, and I'm sure that there are no vacuum leaks. Does anybody have any ideas or suggestions. I've tried just about everything I can think of. I'm thinking that it could possible be an EGR valve or the TPS. I'm not sure if this directly relates to my problem, but it's all I can think of. In case it matters, I pulled the PVC valve and there seems to be a lot of blowby. When it's not misfiring the engine always runs strong. Any help would greatly be appreciated. Please no 4cyl jokes from you V8 guys.