2004 F150, chasing a problem, please help!
#1
2004 F150, chasing a problem, please help!
My 2004 F150, 5.4L 3 valve, hesitates, then breaks up teribly at full throtlle and finally clears out above 3000 rpms and pulls fine. There are no codes being set, I have replaced the fuel filter, checked and cleanded the injectors, replaced all 4 catalytic converters, replaced all 8 coil packs. Still no improvement. Please help.
#4
Something
Yeah check the MAF. When I bought my 2005 5.4L used (it had 96000), I found that the MAF had melted. Yes, melted, so much in fact that I had to shave off plastic with a file before I could remove the sensor from the air box. Before I replaced it, my truck ran like crap unless I gave it lots of gas.
If that doesn't work for you, maybe check the fuel pump? Those things can be a pain in the *** sometimes.
If that doesn't work for you, maybe check the fuel pump? Those things can be a pain in the *** sometimes.
#5
Thanks guys, I replaced the spark plugs today. Not one broke!! Believe it or not! Problem solved. The truck runs better than the day I bought it, and I bought it NEW in 04! Thanks for your help I will check the MAF anyway, I have replaced so many things maybe it wouldn't hurt to change that as well.
#6
curious member
have the same problem changed my plugs first only fixed it for like 2 weeks then went back so you may not b outta the clear yet.... where do you check the MAF sensor
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#8
they make MAF cleaner now!!!!!!... haha... ive never used it but ive heard they do make it... say it works well
#9
yea the MAF cleaner works very well.. friend had to use it on his car! i would recommend (that is if the problem persists) to check smaller, cheaper things (fuel filter) rather than digging into pain in the a** projects like the fuel pump.