Put a new pump on my 90 chevy last feb. Worked fine till now. Lately when it is getting to -5C+ overnight the truck sometimes will not start ( don't hear the pump) till I hit the tank a few times with a rubber hammer. Then once it starts its fine for the rest of the day. I thought it might be water in the tank so dumped a little container of gas line antifreeze in it and it still acts up .
Pump is still under warranty but am not looking forward to changing it again.
I also put on a new fuel pump solenoid last feb.
Any suggestions?
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if the time ever comes you can't see it, you can lay on your back and do it from underneath.
Check the plug where it plugs on the pump It has been known to get corroded and create high resistance....I have had issues with that plug on more than one of those most times when I replace the pump for the first time I get a new repair plug as well..
If that helped it means you must be getting gas in your water
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Fords Rule ! If it ain't designed and manufactured in North America it sucks ! I don't do rice, pasta, fish and chips, sauerkraut, Ikea or other third world motor vehicle !
still have that starting issue so today I replaced the idle air control and noticed that it had chunks of carbon on it. I could have cleaned it but with almost 300,000 km I figured it was time for a new one.
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if the time ever comes you can't see it, you can lay on your back and do it from underneath.
The idle air control motor would have nothing to do with the fuel pump not pressurizing the fuel rail ..If your not hearing the fuel pump for that second when you hit the key , you have a problem in the fuel pump circuit..the idle control valve control the idle.. idle air speed motor..could be the pump..although you just replaced it..still could be defective,,but I am more suspicious of the wiring or at least I would do a continuity test on the wiring while I was doing a wiggle test on the wiring and checking for a good connection at the sending unit module at the tank I have had trouble with the green death and high resistance at the plug that plugs into the module..
I ordered a tbi fuel pressure adapter so I can connect the guage and see what the fuel pressure is on a cold morning. Perhaps my hearing isn't what it use to be and the pump is running...LOL
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if the time ever comes you can't see it, you can lay on your back and do it from underneath.
Try using some "SEA FOAM" additive, works way better than Methyl Hydrate for getting the water out, vehicle may sputter a few times while it tries to run on water, then "Quit using Ethanol" gas as it absorbs water like a sponge!!!!!!! Had the f/pump freeze up on my Suburban [2010] last winter, did the above & switched over to Non Ethanol gas, no problems now & mileage increased on the "better fuel"
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I can only please one person a day, Today is not your day!!Tomorrow doesn't look good either !!!!
well today I replaced the Delphi fuel pump ( warranty) and fuel filter since I was already dealing with the fuel. I checked the connectors and found no sign of the green stuff. I had used dielectric grease when I replaced the fuel pump/sending unit last spring.
So its just wait for another cold night to see if it starts like it should.
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if the time ever comes you can't see it, you can lay on your back and do it from underneath.
-14C here at 6am so tried the truck and it acted the same.....after 3 tries I heard the pump. So decided to switch back to the old fp relay that was replaced last spring when the truck wouldn't start. I had saved the old relay. Tried it and it now works every time. Guess the new relay was the problem. I should know better to check the easy stuff first....oh well!!!!!
Now I have a spare fuel pump since I am not a believer of returning working parts on warranty and having a great parts supplier ( Waynes auto Huntsville) on the hook.
Looks like the problem is solved.
Dennis
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if the time ever comes you can't see it, you can lay on your back and do it from underneath.
Saw "somewhere" where a owner cut a square out of the box over the sender & then cut a 'bigger patch panel from a junk box to bolt or rivet over the hole. makes life easier for the next time!!! Also, I wouldn't let tank get below 1/4 tank, as the fuel is the only "cooling' factor for the pump!!!!
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I can only please one person a day, Today is not your day!!Tomorrow doesn't look good either !!!!
Saw "somewhere" where a owner cut a square out of the box over the sender & then cut a 'bigger patch panel from a junk box to bolt or rivet over the hole. makes life easier for the next time!!! Also, I wouldn't let tank get below 1/4 tank, as the fuel is the only "cooling' factor for the pump!!!!
I have seen that hole done on youtube......but I have a hoist and 8 bolts , 1-grnd strap and 2 connectors later its lifted off and I back the truck back under the box so I can close the rollup door. It also lets me undercoat things I miss with the box on. I do keep the fuel full because you never know when you need to drive to town.......town could be 45 minutes away at night with no service stations open.
I did cut a hole in the floor of my 72 cj5 back in the 70's so I could access the friggin tank....more than once...
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if the time ever comes you can't see it, you can lay on your back and do it from underneath.
