hopefulfan_dc Posted July 7, 2005 Report Share Posted July 7, 2005 Mycar is revving (600--->1600rpm) and I'm not pressing gas....code 12 keeps coming up....that's nothing!...what does this??....how do i make it better??....replaced MAP and IAC...still goes crazy...not an everdy problem but like 2-3X a week. My take....reset cpu and/or replace it Need you guys smarts Quote Link to comment Share on other sites More sharing options...
digitaloutsider Posted July 7, 2005 Report Share Posted July 7, 2005 Are you actually showing a SES light? Quote Link to comment Share on other sites More sharing options...
GnatGoSplat Posted July 7, 2005 Report Share Posted July 7, 2005 Year and engine? Sounds like classic symptoms of a leaky intake manifold gasket, but that's more likely on 3.4 DOHC's and 3100's. Rather uncommon on 2.8/3.1 engines. Test for this by spraying carb cleaner on the intake manifold gasket and see if RPM's change (I've heard WD40 works too). Quote Link to comment Share on other sites More sharing options...
THe_DeTAiL3R Posted July 8, 2005 Report Share Posted July 8, 2005 My 2.8 kinda ran like that (SES light was on but due to a different problem) it stalled also. I cleaned the TB/ IAC and it ran better after that. Maybe try to GM top engine cleaner. Quote Link to comment Share on other sites More sharing options...
JMo60 Posted July 8, 2005 Report Share Posted July 8, 2005 if i remember right, not sure, but i think a 12 is o2 sensor, but check to be sure Quote Link to comment Share on other sites More sharing options...
THe_DeTAiL3R Posted July 8, 2005 Report Share Posted July 8, 2005 code 12 means everything is okay. blink... blink blink. SES light shouldn't even be on. Quote Link to comment Share on other sites More sharing options...
hopefulfan_dc Posted July 14, 2005 Author Report Share Posted July 14, 2005 I have a 1990 3.1 I'national. Yes, have an SES...paperclip says 12..but I know that's wrong...changed IAC and MAP....I think its Intake Manifold but i can't afford that....what can I do to fix this. I am pretty good w/cars but live in anal community...SOL....help!! Quote Link to comment Share on other sites More sharing options...
z34_nut Posted July 14, 2005 Report Share Posted July 14, 2005 bad vaccum? Quote Link to comment Share on other sites More sharing options...
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