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| 84 Fiero 2.5 Occasionally Stalls and Low Idle (Page 1/1) |
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Derekw66
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JUN 26, 02:17 PM
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Hey guys, need a little help. I’ve got an 84C which now has an 86 2.5 converted from an automatic to a five speed. All works well with the exception of stalling once or twice throughout the day as you’re coming to a stop. The engine is bored .30 over with aluminum pistons and a K&N filter, no other mods. The plugs are telling me it’s running a bit lean. I’m still using the 84’s computer. It does idle a bit low when it’s warmed up, about 500rpm, wavering between 400-600 sometimes. Do I need a larger injector? I’ve had 3 different IAC valves in, this one works the best, the others were wildly high at idle, 2500-3000.
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theogre
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JUN 26, 06:26 PM
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ECM needs PROM for Stick Trans and some wiring.
Otherwise expect "Random" stalling and other problems.
Right PROM will use IAC motor to prevent Stalling at stop signs etc. w/ a stick trans vs auto trans it think is still installed.
High Idle can be vac leak.
See my Cave, Vac Leaks
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Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)
The Ogre's Fiero Cave[This message has been edited by theogre (edited 06-26-2022).]
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