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Discussion Starter #1
Yesterday i was jus driving and i was goin to pass someone and i got on it and the rpms were goin up fine then it hit like 4500 and it was like a dead spot wouldnt go past it. then it wouldnt even run. took it to the shop and they cant figure it out either cause it didnt throw a check engine light. now it cranks right up and the top end lags really bad. did this happen to anyone before
 

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Nope, but figure out first if it is spark or fuel related,.. good luck
 

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yeah my cardoes that when its warm and/or humid out, cant vouch for any other time
 

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it's happened to me before...i needed a fuel pump. The guy at the Ford dealer told this happens when people don't refill their tank until it's nearly empty. They replaced fuel pump and now everything is okie dokie.

p.s. if you get your pump replaced, makesure you have as little as possible in the tank. It shaves their repair time off a little.
 

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i don't really think it is the fuel pump, but when that happens it usually is the cat being clogged...but, it could always be something else.
 

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Exact symptoms I had when my fuel pump went. Was on my way back to NY from Ohio over the 4th of July weekend. Started giving me trouble about 8 hours into my 12 hour trip, took me 15 hours to make the trip. Had to stop about every 1/2 hour when it would die, let it sit, start it up and go, and then do it all over again, and again, and again....
 

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if it was the fuel pump wouldn’t it throw a check engine light?
In a word.....

NO..


More in-depth...

True the focus has a large amount of OBD-II codes in it, but with all the things I did to my car, the warranty waived BYE-Bye along time ago...

Why am I telling you this and not just getting into the whole OBD-II thing I was just on??

So you know I am not pulling this info out of my a$$..

I have the Chilton manual, the Haynes Manual, and the actual 2-Book FORD Factory Shop Workbook set..

After doing a little research on your problem, I found that the fuel pump will not trigger the MIL because there are no links from the fuel pump to the system that activates the indicator. The only way the fuel pump could trigger the light is if it directly caused a fault in one of the systems that is monitored by the OBD-II system. But tracing the sensors there's only really 2 or 3 that the pump would affect, (ie. fuel rail pressure, fuel tank internal pressure, fuel temperature) and for them to be messed up, your car wouldn't start at all.... So if the fuel pump is in fact the source of your trouble, then the answer is NO.. It wouldn't make the MIL activate.
 

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That happened to me also, on a long road trip from S. Jersey to Pittsburgh, then Cleveland. When it first happend, it just started to run rough, after which I pulled over and got a snack, then it was fine to Pittsburgh and a little ways into Ohio. In Ohio, I had to constantly stop and start until I got to Cleveland. However, the whole way back from Ohio to Pittsburgh, then a couple days later to NJ it was fine. I brought it to the dealer the following week and they replaced the fuel pump and filter. It's been fine since (only around 5k miles has sinced passed though, with no extended trips). My car had about 25k miles on it...hopefully this won't happen around 50k...the dealer said the replacement oem pump is different than the old oem one...hopefully the problems are all ironed out.
 

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Discussion Starter #14
Thanks guys... i usually use 76 gas and 89 octane... they still cant find out whats wrong. i dunno they said they would just start one place and work to another. i really appreciate the help!!
 

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its probably the fuel pump...had the same problem with an 88GMC pickup...Of course it would just stop running after a few times this problem happened though...
 

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I'm having the same issue with my 2002 zx3 focus (2.0, 5-speed) the dealer has checked it out twice this week and they say they can find nothing wrong. There is a very noticeable loss in power from about 4500 rpm's and up. The engine runs smoothly and it doesn't cut out or die. It just has no power. I was on a straight, flat, stretch of I-5 and I decided to see how fast I could go and it wouldn't even top 85. The dealer insists that it isn't the fuel pump, they can't find anything wrong with it. They said they test drove it and compared it to another focus and it seemed fine. I know that is bs because I also have a contour with the 2.0 and auto tranny, and with me in my focus and my brother in the contour I could take him by about 3 or 4 car lengths in the 1/4. Now it's the other way around, he takes me by about 4 or 5 car lengths. So I know I'm not imagining things. So I'm going to take it back in tomorrow and ask them again to check the fuel pump. Any other suggestions would be greatly appreciated.
 

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My fuel pump went out on my 2000 foci. It will just keep gettin worse. I never understood y they didnt recal that f***in thing? It ran me about $650 from the dealership to get it fixed!!
 
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