Engine RPMs limited?

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Jul 12, 2015 | 09:27 AM

robert1989

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From: Franklin Square NY

Engine RPMs limited?

Hello,
My 98 c5 is having an issue with reaching hi rpms in park or while driving. It feels like it is hitting a limiter.

Jul 12, 2015 | 09:48 AM

imlowr2

Racer

Joined: Jul 2015

Posts: 296

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From: Valencia CA

Quote:

Originally Posted by robert19890412

Hello,
My 98 c5 is having an issue with reaching hi rpms in park or while driving. It feels like it is hitting a limiter.

How high are you taking the rpms now?

Jul 12, 2015 | 10:06 AM

PMZ06

Cruising

Joined: May 2015

Posts: 10

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From: Hays KS

Quote:

Originally Posted by robert19890412

Hello,
My 98 c5 is having an issue with reaching hi rpms in park or while driving. It feels like it is hitting a limiter.

Just wondering? What rpm limit are you trying to reach and why do that in park. Where does it stall and and mph when it does.:

Jul 12, 2015 | 10:49 AM

robert1989

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Joined: Nov 2011

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From: Franklin Square NY

It's hitting the limiter at like 5500 sometimes lower.

Jul 12, 2015 | 11:15 AM

73Corvette

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From: OK

Just had our 1st to 4th Skip Shift light changed to the Rev Limiter Light at 6700 RPM
Should go well past 5500 RPM...

Jul 12, 2015 | 11:52 AM

robert1989

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From: Franklin Square NY

rtd 1760 1780 bcm 2723 lcdm 2284 1016 scm 2605 rfa 1096 1064

Jul 12, 2015 | 12:29 PM

73Corvette

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From: OK

Throttle Position Sensor?

Jul 12, 2015 | 12:34 PM

robert1989

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Joined: Nov 2011

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From: Franklin Square NY

I have an aftermarket fuel pressure regulator which shows that it is holding pressure. It drops a little when I start to rev up the engine but i assume that is normal. The TPS has gotten wet before I disassembled it dried it out and reinstalled it but that was over 2 years ago I also would assume the tps would show a code.

I'm thinking it is fuel related just not sure how the fuel filter is about 60k old and the pump is original.

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Jul 12, 2015 | 01:11 PM

robert1989

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Joined: Nov 2011

Posts: 181

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From: Franklin Square NY

Quote:

Originally Posted by 8VETTE7

Fuel pressure should be at about 58lbs. If the pump was an issue then I would expect to see pressure drop when you get to higher RPM's.

Are you running an oiled air filter element? Sometimes excess oil will contaminate the MAF.

Might watch under the hood at night to see if you have a spark jumping problem at higher RPM.

As i said above it will be a hunt........

I have to just make to back to New York on the 31st and then start hunting. I'm down in Mclean VA for job training until then. Luckily even if it was the fuel pump it is easily accessible.