Idle Problem
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Idle Problem
here is the problem. this truck cranks on the first try every time runs strong and never hickups. i just put a new fuel filter and belt on it, the belt just because it needed it, the filter as a cheap attempt tofis the problem. the problem is that the truck will not idle.let me correct that on start up it idles fine, but if your goose the pedal it dies if you drive it and miss a down shift and let the rpms drop it will hesitate at 500 for a split second and then dead. i am really confused, but that is what this web site is all about, i hope. thankyou for any help and or advice, matt
92 f350 zf5 banks turbo
92 f350 zf5 banks turbo
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Joined: Sep 2002
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From: Northeastern Pa - USA
Hi Matt, did you recently fuel it up? Sounds like you either got a dose of bad fuel, bad lift pump, air in the lines or the injection pump is taking a dump on you. Usually the bad fuel will show up for a while till its all used up or you doctor it up with power service or diesel kleen. The lift pump usually shows up with fuel leaking out the weep hole on the lift pump - search for test on lift pump. Air in the lines usually acts up at first start but seems to clear up after it runs for a bit and hard starting, rough idle. Injection pump is tough to single out - last resort. Hope this helps. --- out
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Joined: Dec 2004
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From: northern new england
Maybe the seal on the filter you just installed is not good. Usually when sometihng starts happening after service it is directly to the work performed. Did you fill the filter with straight diesel when you changed it? I would look at what you just did.
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there was no service just before the problem, it was done to fix the problem, i think that it is bad diesel, i got a bunch of free diesel from a truck with a hole in his tank and the tankthat i put it in to hold it until i could fill up my big tank i think had some water and trash in it. i am going to try the big jug of diesel clean today and pray, if that is not it, i really dont want to think about what else it could be, ip.
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Joined: Aug 2003
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From: newfoundland canada
Originally Posted by why165
i dont think that it is the lift pupm, because i have 3 tanks and it will do it on all three tanks, the fuel or the ip, thankyou for the info
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Lead Driver
Joined: Jan 2005
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From: Huntington Indiana
wonder if with all the stuff in the tank that he might have particilly plugged the lift pump strainer.
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Pardon me for jumping in, but thanks for the tip on the pump strainer. Did not know about dem apples. That could easliy be part of my fuel problem too. Thanks!
Originally Posted by bigredtruckmi
wonder if with all the stuff in the tank that he might have particilly plugged the lift pump strainer.
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ok were is the lift pump? i know fuel pump, i have 3 of those and i know ip pump i got one of those, tell me were the lift pump is?? correct me if i am wrong, i thought that the fuel system was
fuel pump
injection pump
injectors
matt
fuel pump
injection pump
injectors
matt
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Joined: Nov 2003
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From: Nutter Fort, WV
The lift pump is the stock mechanical fuel pump on the passenger side lower front of the engine.
Sounds like you have three electric pumps if I am reading your post right though.
If you drain the water seperator on the bottom of the fuel filter, do you get water out of it?
Or change the fuel filter and drain the filter in a clean pan and see what is in there besides fuel.
Sounds like you have three electric pumps if I am reading your post right though.
If you drain the water seperator on the bottom of the fuel filter, do you get water out of it?
Or change the fuel filter and drain the filter in a clean pan and see what is in there besides fuel.
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From: Monroe, WA
I hate to say it, but stalling after stabbing the throttle is almost always the injector pump. 
Also, there isn't any fuel pump strainer that I've ever seen on these things... unless they're in the tanks.
Also, there isn't any fuel pump strainer that I've ever seen on these things... unless they're in the tanks.
Last edited by Spectramac; Feb 27, 2005 at 03:21 PM.
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i do have 3 electric pumps. when i took the old filter off it had a little water and some trash in it, but what do you expect after 30000 miles. i took a big jug of diesel klean and poured it in the 100 gallon tank, the tank that got the bad diesel. after 30 miles all is well again. truck doesnt die when it returns to idle. thank god for diesel klean. thankyou all for all of the great help and information, matt