Slight Miss at Idle - No CEL Flashing
10-14-2014, 12:32 PM
#11
I'm interested as I've been chasing the same rough idle for quite a while. I've changed plugs, COP's, cleaned throttle body, cleaned MAF sensor, changed out the deteriorated vapor hose ($44 at Tasca or $77+ 9.25% tax from dealer, no brainer here) from the EVAP cannister purge valve to the passenger side back of the intake (part # 4L34-9D289-BG on a 04 5.4L), replaced the foam around the air filter tray, even updated VCT solenoids, and more than one injector cleaner. Not a single code, but a nuisance never-the-less.
Definitely curious about the new gas tank.
Definitely curious about the new gas tank.
Last edited by xrider; 10-14-2014 at 12:38 PM.
10-14-2014, 01:15 PM
#12
Senior Member
I too have had this problem for over a year and a half. After new (about everything) it's still there. I wish there was a program we could plug in and get readings on everything from vacuum to mechanical. After all, it is only a computer on wheels.
10-15-2014, 09:37 AM
#13
Sorry to hear that. Posting the whole story is on my list of things to do. I'll try to get to it today and share it with you all.
10-15-2014, 10:20 AM
#14
I'm interested as I've been chasing the same rough idle for quite a while. I've changed plugs, COP's, cleaned throttle body, cleaned MAF sensor, changed out the deteriorated vapor hose ($44 at Tasca or $77+ 9.25% tax from dealer, no brainer here) from the EVAP cannister purge valve to the passenger side back of the intake (part # 4L34-9D289-BG on a 04 5.4L), replaced the foam around the air filter tray, even updated VCT solenoids, and more than one injector cleaner. Not a single code, but a nuisance never-the-less.
Definitely curious about the new gas tank.
Definitely curious about the new gas tank.
https://www.f150forum.com/f4/last-fe...-story-276336/