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engine idle fluctuates

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New User

Feb 12, 2013, 5:16 PM

Post #1 of 3 (1971 views)
engine idle fluctuates Sign In

To whom it may concern,

Year of vehicle : 1990
Make of Vehicle : Toyota
Model of vehicle : Pick-up (manual transmission)
Engine size : 4 cylinder (does not know the size of the engine)
Mileage : 163812 miles

Problem : Once the engine is warm and you step on the brakes, the engine's idle fluctuates, but if you release the brakes the idle becomes normal again. When doing the check-up, I noticed that the fluctuation is gone every time I clipped (with pliers) the hose coming from pcv valve ( even if someone still step on the brake ). Pcv valve was replaced just last six months ago. This problem does not occur if the engine is still not warm.

Thanks, Romy_bakal

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Feb 12, 2013, 5:26 PM

Post #2 of 3 (1953 views)
Re: engine idle fluctuates Sign In

Sounds like you have a major vacuum leak somewhere that you need to find.


We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.

Ultimate Carjunky / Moderator
Discretesignals profile image

Feb 12, 2013, 6:48 PM

Post #3 of 3 (1925 views)
Re: engine idle fluctuates Sign In

Hear any hissing noises inside the cab where the booster rod comes through the firewall when you press on the brake pedal?

Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

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