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Old 03-15-2009, 11:41 PM
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Help!! Rev limiter issue

Quick question, I just changed the intake/ exhaust gasket on my 01 4.0. I've torn this down several times now, new headers, and so forth. This time I cleaned the parts with steel wool, I took care to make sure no fragments got in anything, but after I got everything together, I started it up and the engine screemed right to the rev limiter. I quickley shut the engine down. I attempted to start it a couple more times and even pulled the neg battery terminal, and the same results right to the rev limiter. I havent had the chance to tear it apart again cause I had to leave for work, just trying to get some input before I start on it tomorrow. When I changed the gasket I pulled the injectors, including unplugging them, pulled the throttle body, pulled the power steering pump and intake and exhast, and I pulled the collector pipe as well to access the bolts easier from underneath. Is it possible that steel wool parts are in the intake and causing the issue????
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Old 03-15-2009, 11:49 PM   #2
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Sounds like the TB is stuck wide open. Check to make sure it is very clean.

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Old 03-16-2009, 01:15 AM   #3
Knows a couple things...

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Your intake manifold is leaking where it is bolted to the head which is causing a vacuum leak that is causing your high rpms. When you mounted it after replacing the header, you didn't get the intake manifold properly positioned on the barely perceptible positioning studs. Remove it, reinstall it more carefully and your problem will be solved. This is a common problem after doing the job you did... it's not easy to get the intake manifold precisely positioned but that is exactly what you have to do to prevent this from happening.
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Old 03-16-2009, 05:04 AM
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I think your right again Jerry, forgot to check to see if those studs got in there. I'll hit it first thing in the am and let you know. This is about the fourth time I've torn all this apart so I guess u get kinda complaciant after doing it so many times. I knew it was something small that I over looked. Thanks again
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Old 03-17-2009, 10:48 PM
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It was exactly as stated abone got the left side stud on, right side just missed, thanks again.
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