95 Neon - runs poorly when cold


Old 11-19-03, 06:33 AM
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95 Neon - runs poorly when cold

95 Neon, 2.0 DOHC, A/C, runs poorly when cold. Misses, poor power and acceleration. It smoothes out when it warms up. Fuel filter? Has new plugs, clean oil 5/30.
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Old 11-19-03, 11:03 PM
mike from nj
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how many miles?
wires are supposed to be replaced every 60,000 miles, and cheap ones don't even last that long.

maybe you need to check fuel pressure or the engine's compression,

i've seen some fuel rails clog with a mystery substance, but they usually run rough at all temps and all rpms,

spray around the intake gasket(paper), maybe a crack is just starting to develop, spray with something flammable and see if the engine's rpm fluctuates,

there is a bulletin for improved idle performance on a cold start, it involves reprogramming the pcm if built after a certain date, or replacing it if built before that same date (august 6, 1994), look in the door jamb for the build date, (MDH-??-??-??)

there is another bulletin, but it isn't listed until the 1997 model year, for carbon deposits holding the valves open slightly on a cold start, and causing a rough idle, it involves replacing all the valve springs,

i've even seen the wrong plugs cause this, are you using plain old champions?

how really rough is it?
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