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Likely fuel flow issues

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Old Mar 20, 2011 | 10:01 PM
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Default Likely fuel flow issues
1990 C4 L98 ZF 6sp. Appear to have a fuel flow issue, particularly at wide open throttle. New fuel injectors match flow in the last 6 months. Doesn't always occur but usually during competition runs in Autocross.

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Old Mar 20, 2011 | 10:09 PM
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Originally Posted by grantar2
1990 C4 L98 ZF 6sp. Appear to have a fuel flow issue, particularly at wide open throttle. New fuel injectors match flow in the last 6 months. Doesn't always occur but usually during competition runs in Autocross.

Thoughts?
Fuel pressure reading taken by you at idle speeds and WOT ?

Brian
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Old Mar 20, 2011 | 10:48 PM
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fuel pressure is usually not intermentent, if its low its always low, if its just doing it sometimes, i would look somewhere else,like a sensor
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Old Mar 21, 2011 | 10:07 AM
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Originally Posted by grantar2
1990 C4 L98 ZF 6sp. Doesn't always occur but usually during competition runs in Autocross.

Thoughts?
Fuel slosh ? What is your fuel level at, during your runs ?
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Old Mar 21, 2011 | 10:23 AM
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Originally Posted by grantar2
1990 C4 L98 ZF 6sp. New fuel injectors match flow in the last 6 months.
What does this mean? What is your fuel pressure at wot?
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Old Mar 21, 2011 | 10:50 AM
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Originally Posted by 383vett
What does this mean? What is your fuel pressure at wot?
wide open throttle
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Old Mar 21, 2011 | 11:23 AM
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Originally Posted by Crowhater
wide open throttle
I'm asking 2 different questions; 1, what does matching fuel pressure mean, and 2, what is the fuel pressure at wide open throttle.
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Old Mar 21, 2011 | 03:17 PM
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Originally Posted by 383vett
I'm asking 2 different questions; 1, what does matching fuel pressure mean, and 2, what is the fuel pressure at wide open throttle.
The injectors are flow matched(each injector flows the same amount during a given amount of time), not matching fuel pressure.
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Old Mar 21, 2011 | 03:30 PM
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Originally Posted by AGENT 86
The injectors are flow matched(each injector flows the same amount during a given amount of time), not matching fuel pressure.
Got it! I'm a little slow sometimes on Mondays (and other days too).
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