HELP!!!
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HELP!!!
Ive spent 3 weeks trying to figure this out... i got an 87 heavy 3/4 dual tank.. one day it stopped pumping fuel.. changed out pumps and checked all wiring.. guages registering fuel.. just not getting power to the pumps.. i was woundering if some one had a wiring diagram or some advice...
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im pretty sure that was one of the first things i checked... i was driving the thing all day just fine.. went into a parking lot turned it off... less then 5 mins later i tried it again and i could tell by the smell it wasnt getting fuel... i disconnected all the fuel lines starting by the engine and followed it all the way back to the tanks.. no fuel is going anywhere.. cant hear the pumps fire up when the key is turned.. replaced pumps... still nothing... person who had the truck befor butchered the wiring and i redid the wiring with proper connecters since its been down... still nothing... turn the key the rest of the truck works... the gas guages register the proper amount of fuel in the tanks.. but just wont pump anything..
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Sorry. PCM is Power Control Module...Cant remember if peopeple call it PCM or EEM...Either way its the main computer im talking about (EEC, electronic engine control), Its located in the passenger kick panel. It has direct ground on it and make sure your chassis grounds and the ground going to the engine it good. You also have a ground near the started solenoin under the hood (and some others).
Subford gave my a good diagram of the grounds that was nice, I'll see if I can dig up the link.
But the main computer controls switching on those fuel pump relays on...Also do you have a dual tank, that switch Kingfisher is talking about could be a culprit.
Subford gave my a good diagram of the grounds that was nice, I'll see if I can dig up the link.
But the main computer controls switching on those fuel pump relays on...Also do you have a dual tank, that switch Kingfisher is talking about could be a culprit.
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switch works fine.. like i said earlier.. when flicked it reads the levels in the toher tank.. and vise versa.. steady results.. if that was the culprit it would have just bin stuck on the one tank or got jammed halfway through the transfer.. my buddy is running his truck atm without the switch.. he still ahs his one tank going and its workin fine.. pulled the switch right out and still works...
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inertia switch?? description and location? im not good with technical terms.. just good at fixen ****.. this doesnt make any sense to me ive checked almost everything i could reach on that truck that was connected to the fuel lines apart from the lines going to other patrs from that plug with 50+ wires comin outa it pcm or whatever.. i cant reach the inside of the plug because the ebrake is in the way.. but i will check under the passenger kick pannel when im at the truck nextime.. its bin sitting on the side of the road fer 3 weeks and theres snow on the ground im climbing through to work on this ****.. im sick of this ****.. was supposed to be a quick 20 min fix...
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yay i think i found a diagram!!
1987 ford I6 EFI ecm - Google Search
3rd row from top 2nd image from right hand side of row
1987 ford I6 EFI ecm - Google Search
3rd row from top 2nd image from right hand side of row
Hotshot
Joined: Jan 2008
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From: Rochdale MA
inertia switch?? description and location? im not good with technical terms.. just good at fixen ****.. this doesnt make any sense to me ive checked almost everything i could reach on that truck that was connected to the fuel lines apart from the lines going to other patrs from that plug with 50+ wires comin outa it pcm or whatever.. i cant reach the inside of the plug because the ebrake is in the way.. but i will check under the passenger kick pannel when im at the truck nextime.. its bin sitting on the side of the road fer 3 weeks and theres snow on the ground im climbing through to work on this ****.. im sick of this ****.. was supposed to be a quick 20 min fix...