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#1
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Does this sound like a timing belt issue or IAB valve?
When at idle (after my engine has warmed up) my engine has a slight vibration. This is mainly while at stoplights when the car is sitting in "D". It is not that bad but it is enought to rattle the stuff in my door handles (I put my sun glasses or cell phone there sometimes) or it causes a slight rattle in the plastic pieces in my interior. It doesn't matter if my AC is on either. Could my timing belt be a "cog off" or is my IAB (Idle Air Bypass) valve dirty? The car runs well and performs normal in all other ways.
Thanks for the help
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Paul 1992 LSl (Black Mica) 1965 Mustang G.T. Fastback 1990 Mustang G.T. Convertible 1986 1/2 Nissan 4x4 2004 Vovlo XC70 (wife's) Wonderful Wife Wonderful Son 2 Cats Incredibly blessed! |
#2
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is the enine actually idling rough or is it more or less just a vibration. Bad motor mounts could cause a vibration like that
TOm |
#3
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Timing belt - no.
IAC - no, unless it's idling at 300 rpm and about to stall. Sounds like one or more misfires, to me.
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ASE Certified Master Automotive Technician w/L1. ASE Certified Master Medium/Heavy Truck Technician. Certified EVT (Emergency Vehicle Technician) |
#4
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Thanks
Thanks for the response. Car had been acting worse as far as performance. It is hesitating (more than usual) when cold and at low RPMS with the torque converter in lock-up the engine hesitates. I'm going to replace the fuel filter to see if there is any change. It's been a long while since I replaced it.
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#5
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[QUOTE=SVX JAZZ]Thanks for the response. Car had been acting worse as far as performance. It is hesitating (more than usual) when cold and at low RPMS with the torque converter in lock-up the engine hesitates. I'm going to replace the fuel filter to see if there is any change. It's been a long while since I replaced it.[/QUOTE
I will back Beav and say coil/coils or plug/plugs.
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! |
#6
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Thanks, replaced those
Thanks, I tested and replaced two bad coils, replaced spark plugs and also put in new injectors about 2 years ago. The bad coils were actualy causing backfires. No backfires now just hesitation.
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