Truck idles like crap/dies when fuel level is less than 1/4 tank, fuel pump?
#1
Truck idles like crap/dies when fuel level is less than 1/4 tank, fuel pump?
I have had this annoying problem for about a year now. When ever the fuel level gets below 1/4 tank the truck starts having some idle issues... It will surge and sometimes die... But it only does it when it is below a 1/4 tank... I am starting to think it is my fuel pump. Another reason i think my fuel pump may be weak, is my VE values in the 95-100kpa range are above 110%, i think i peaks at 115%... I have 31# 8.1L injectors and my IDC is about 74%.... I have put a mechanical fuel pressure gauge on it before, the fuel pressure was good, except i had about 4-5 PSI drop at WOT...
I only have issues at idle when it is below 1/4 tank, once off idle it is the exact same.... My LTFTs stay about the same the no matter what fuel level i am at... The only other thing i can think of is there might be some emmissions test that occurs below 1/4 tank...
Any ideas?
I only have issues at idle when it is below 1/4 tank, once off idle it is the exact same.... My LTFTs stay about the same the no matter what fuel level i am at... The only other thing i can think of is there might be some emmissions test that occurs below 1/4 tank...
Any ideas?
#7
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I've had the same problem with the work truck. Originally it started when 3/4 of the tank had been used. Just before the pump went out I could only use half a tank before it acted up. Good luck.