Mechanics

ROUGH IDLE

2000 Mazda b2500 • 4 cylinder 2WD Manual • 180 miles

My 00 mazda b2500 has been having idle problems for a while now. The easiest way to explain it is, when sitting at idle in neutral and throttling the engine above 3000 rpm and letting off the gas it drops into a very low idle (kinda like a bad load recovery?) Normally I would figure it's an easy IACV replacement. But that didn't help. Neither did the plugs, wires, fuel filter and injector cleaner. I'm at a loss. I have no MIL. Or pending codes. Oh and i've also checked my tps, it's normal. Please help!
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Jeko
December 12, 2010.




Check the EGR valve and MAF sensor

Engine running rough or misfiring can be cause by the following: 1. Defective spark plug.
2. Inadequate spark/coil, defective spark plug wire.
3. Lack of compression
4. Vacuum leak
5. Fautly fuel injectors.
6. Insufficient fuel pressure.
7. Contaminated fuel.
8. EGR valve that is leaking.
9. Oxygen sensors.

Rasmataz
Dec 12, 2010.


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