Aksonny Posted May 8, 2015 Report Share Posted May 8, 2015 truck runs perfect then all of a sudden starts running rough idle and cutting off, run some codes and random misfire shows up and when running codes it stops and ran fine until the next day after work, replaced spark plugs and wires but still rough. Ran better while driving after that, replaced alternator anyways bearing was squealing a little but still rough idle. Checked the MAF and it was good. Oil pressure dips to nothing a few times but is good now, ran a code and had an EVAP leak somewhere. Tomorrow I'm gonna clean the throttle body and checked the air intake for leaks and nothing. Anybody got any input on what else could be causing this? Quote Link to comment Share on other sites More sharing options...
Aksonny Posted May 8, 2015 Author Report Share Posted May 8, 2015 Also have no cats so maybe an O2 censor took a crap? Quote Link to comment Share on other sites More sharing options...
1BAD2K Posted May 9, 2015 Report Share Posted May 9, 2015 Usually if it's an O2 sensor, it will show a code for it low or no voltage Quote Link to comment Share on other sites More sharing options...
AKSSS Posted May 11, 2015 Report Share Posted May 11, 2015 Check intake manifold gaskets. It's easy and common issue. Quote Link to comment Share on other sites More sharing options...
Aksonny Posted May 14, 2015 Author Report Share Posted May 14, 2015 Throttle body looked like a clogged toilet. But now my engine seems weaker after the spark plugs and wires were changed. it's not snappy and has a different tone to it Quote Link to comment Share on other sites More sharing options...
EXGM Posted May 14, 2015 Report Share Posted May 14, 2015 (edited) Still may have an intake leak. The old trick a lot of people use is to squirt a SMALL amount of brake clean around intake. Spray a little and slowly work your way around. If engine speed increases you have found leak. I would test first because it has a plastic intake. This works on "older" cars with metal intakes. Edited May 14, 2015 by EXGM (see edit history) Quote Link to comment Share on other sites More sharing options...
Aksonny Posted May 14, 2015 Author Report Share Posted May 14, 2015 Performed these tests many times on a snowmobile. It's the exact same process. I'll be sure to try it out and see what I get Quote Link to comment Share on other sites More sharing options...
Akslowroller Posted May 19, 2015 Report Share Posted May 19, 2015 Any update sonny? Did you check your plug gap? Quote Link to comment Share on other sites More sharing options...
Aksonny Posted May 21, 2015 Author Report Share Posted May 21, 2015 Didn't check my gap yet but that seems like a good project for after work today Quote Link to comment Share on other sites More sharing options...
Aksonny Posted June 1, 2015 Author Report Share Posted June 1, 2015 All plugs gapped at .40 and still running like crap, ordered some AC Delco wires and ngk plugs Quote Link to comment Share on other sites More sharing options...
Blown 346 Posted June 5, 2015 Report Share Posted June 5, 2015 I run a larger gap than that. I run .055. What plugs are in it and what does the burn look like? Quote Link to comment Share on other sites More sharing options...
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