Volvo 496 Mag RPM Flutter
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Volvo 496 Mag RPM Flutter
I've got a 2001 volvo 8.1gi (496) in a Cobalt 262. The engine has what I can only describe as an RPM flutter or fluctation from 3200-3700 RPMs. The engine fluctuates about 50 RPMs inside this RPM window. The engine idles flawless and once the RPM's are above 3700, the engine runs smooth as silk all the way to 4600. The engine also runs perfect up to 3200 RPM's. The problem doesn't seem to be throttle cable/lever related, and the flutter is always present between 3200-3700. You can actually feel the engine fluctuate as if you were moving the throttle lever slightly up and down. Any ideas what may be causing this (ECU and/or fuel injection problems?)?
Thanks, Jake
Thanks, Jake
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New plug wire sets!
496-8.1L engine owners here on OSO, remember, we take brand new sets of plug wires off of new 496 engines we rework for our coil relocation kits and we sell these brand new sets of take-off wires sets for $85 per set of wires. You can't beat that price with a stick! so if you need new plug wire sets, let us know, Raylar has lots of sets in stock.
Just a money saving suggestion.
Best Regards,
Ray @ Raylar
Just a money saving suggestion.
Best Regards,
Ray @ Raylar
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I appreciate it Ray. BTW, does anyone think this problem could be from a bad Throttle Position Sensor (TPS) or possibly a failing fuel pump (fuel pressure fluctuating in problem RPM range)?