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Car hesitates


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jberry2
New User

Jul 5, 2010, 9:50 PM

Post #1 of 4 (2085 views)
post icon Car hesitates Sign In

1992 grand marquise. Going about 20 the car makes some kind of chugging water sound when im accelerating. If I let off the gas and then press back on it the sound will go away and then accelerate fine. checked trans fluid and it is fine. sounds like its coming from the right side or middle of car.
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Just got fuel pump replaced and now the car wont hold anything above a half a tank. 1992 grand marquise.




(This post was edited by Hammer Time on Jul 6, 2010, 8:17 AM)


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Jul 6, 2010, 9:16 AM

Post #2 of 4 (2075 views)
Re: Car hesitates Sign In

The water noise could be coolant flowing too fast thru the heater core. At least the engine before the 4.6 used a hidden flow restrictor which is just a short piece of metal with a smaller hole than the hose on inlet side to slow the flow and if that hose was replaced and this had that, that can cause the noise without it. You can feel if it's there squeezing the hose commonly used on cars with the temp delay for fan and in the hose from that unit on way to heater core if it had one at all?

It could also be low coolant level and air making sounds - hard to say for sure with either so you have to check.

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Is the fuel not filling the tank really not full or just not reading full? I know that's hard to tell. These cars in general when reading 1/2 actually have less than half the total capacity usually. If you just had a shop do the fuel pump you should be discussing it with them as it might be the sender or perhaps a vent back to fuel neck isn't good fooling the pumps to click off early and constantly??

T



jberry2
New User

Jul 6, 2010, 4:37 PM

Post #3 of 4 (2064 views)
Re: Car hesitates Sign In

I took it to a shop today and they said the fuel pump was leaking. They said I needed a new fuel pump, but as I stated I just got that one put in. Is there anyway that they could have sealed it instead of replacing it?


Tom Greenleaf
Ultimate Carjunky / Moderator
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Jul 7, 2010, 2:05 AM

Post #4 of 4 (2057 views)
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">>I took it to a shop today and they said fuel pump was leaking.<<"

Didn't you take it to the shop that just did the fuel pump? If not why not? Am I reading something wrong?

If fuel pump was leaking it would be inside the tank and unseen IMO. If you see a leak or smell gas then that has to be fixed. That could be (if so) rusted tank, hoses, fuel neck and seal etc.

Basic pic of a fuel gauge where pump would go in - not your car just for the idea........



There's a ring that when turned releases the unit gauge and pump and when installed fastens it with a rubber seal. You wouldn't just go in there and try to seal a fuel pump??!! I've never heard of something like that. Either they replaced it or didn't. If you paid for a new pump you should have a good, new working pump,

T







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