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05-03-2013, 01:17 PM | #1 | |
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98 rodeo - engine speed drops to idle while driving
have a 98 rodeo, with a V6 & Auto trans. have an intermittent problem - as I am driving engine will occasionally drop to idle speed and then pick back up to driving speed. Engine keeps running smoothly, just at idle speed.
CEL does not come on / no codes Replaced Throttle Position Sensor - and thought I had found the problem, but since it is so random, it just didn't happen again for 1 1/2 weeks. Anyone else have this issue? Suggestions? |
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05-03-2013, 10:22 PM | #2 | |
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Re: 98 rodeo - engine speed drops to idle while driving
very odd since the throttle is just an old cable style ...
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-Ryan Isuzu Moderator Car Show Tips Operations manager with a results-driven passion for process improvement FAQ 98-04 Isuzu Rodeo, Rodeo Sport, Amigo, Trooper SOLD - NOV2015 - 2000 Amigo, V6, HT winter, ST summer, 2wd |
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05-04-2013, 04:17 PM | #3 | |
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Re: 98 rodeo - engine speed drops to idle while driving
"very odd since the throttle is just an old cable style ..."
That is what I thought, Amigo-2k. That is why I thought maybe the TPS was not reading the open throttle and not telling the computer to give it more gas. But, apparently I was wrong. lol |
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05-12-2013, 09:21 PM | #4 | |
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Re: 98 rodeo - engine speed drops to idle while driving
Update
I cleaned the Mass Air Flow sensor & replaced the fuel filter. Still no solution.... |
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05-15-2013, 10:55 AM | #5 | |
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Re: 98 rodeo - engine speed drops to idle while driving
clogged converters??
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05-15-2013, 03:06 PM | #6 | |
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Re: 98 rodeo - engine speed drops to idle while driving
Ooooo.... that doesn't sound good. Is there a way to tell for sure without replacing them? Do any of the Catalytic Converter cleaners really work?
ALSO, I checked the fuel pressure at the fuel rail. 50psi with vacuum hose disconnected from fuel pressure regulator. 37psi with vacuum hose connected. Pressure regulator was replaced just over a year ago. |
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05-15-2013, 04:55 PM | #7 | ||
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Re: 98 rodeo - engine speed drops to idle while driving
Quote:
I actually took mine to Mineke Muffler and they checked it for free. The can check the back pressure. Mine had a left clogged converter and it would slow down to 40 mph on a hill. You could also hear a louder noise coming from the air box (air filter housing) when giving it the gas. |
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05-16-2013, 08:15 AM | #8 | |
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Re: 98 rodeo - engine speed drops to idle while driving
Thanks, I'll give that a check.
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