Help w/ rough iddle (part 2)

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posted
19 years ago

Sun, Dec 5, 2004 1:56 PM

Pepito opined in news:2004120507543916807%josephamadeusNSPAM@mindspringcom:

Speed density doesnt have a MAF, and you dont...IIRC, the 2.3 didnt use a MAF till it used the DIS ignition system... around '91

So you have no codes, you've changed the FPR and runs rough on warmup yet RPM's are normal...

Afraid, that means I'd be looking for a bad cylinder... meaning low compression. YOu could have a burnt valve, cracked exhaust ports or broken rings in one or more..

Does the engine use a lot of oil?

After a fairly long trip, let engine cool a little and pull the plugs, look at insulators, you'll probably find one much dirtier than others.. note colors/shades of deposits

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posted
19 years ago

Mon, Dec 6, 2004 4:47 PM

It does burn oil and if it helps you come to a conclusion,,, when I replaced the air filter I noticed a 1 or 2 inches wide yellowish stain that smelled like engine oil in the part of the filter where it filters vaccum coming from 2 small plastic hoses, (i hope you get the picture)

I haven't seen any weird looking smoke coming from the exaust, just gas smell from time to time, when I replaced the plugs they looked pretty normal, only gray deposits in the tip.

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posted
19 years ago

Tue, Dec 7, 2004 3:52 AM

Pepito opined

Uh-oh... have you been losing coolant?

Check the dipstick and oil filler for any sign of yellow-brownish deposits, small moisture droplets, etc.

Also check the exhaust for "puffing".. and with engine idling best as it can, hold a piece of light paper over the open oil filler, it shoudl suck down, not "flap".

if it's puffin OUT of the filler you have bad rings .. or worse.

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posted
19 years ago

Tue, Dec 7, 2004 1:19 PM

The oil looks crystal clear, no coolant lose, I replaced the water pump around 4 months ago. Never had coolant mixing with the oil or any abnormal smoke from the exaust besides the gas smell thing.