what are the symptoms would be if fuel pressure is low in fuel injected system?
What are the symptoms if fuel pressure is low?
Jan 14, 2004
4 Replies
First reply
Most likely, poor performance when more fuel delivery is needed. Also a "lean exhaust" trouble code may be set.
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Most likely, poor performance when more fuel delivery is needed. Also a "lean exhaust" trouble code may be set.
Depends on how "low" relative to normal the pressure is, but in general the symptoms are all the same as for a lean condition on a carbureted car.
A few PSI off and you might not notice anything other than a little pinging or light surging under heavy throttle. Enough of that and a "lean" code will indeed get set.
Significantly low pressure will cause a noticable surge, stumble, or loss of power on acceleration, maybe backfiring, and possibly a rough idle or stalling as well.
Robert Hancock wrote:
The biggest symptom would be when you hook up a fuel pressure gauge to the vehicle, and it reads lower then what the manufacturer specs are.
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