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Ford F-Series Gasoline Engine Problems

163 messages,  Last post on Oct 15, 2009 at 9:39 PM

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What is this discussion about? Ford F-150, Ford F-250, Ford F-350, Engine, Truck

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#154 of 163 Re: 99 F350 EGR System Fault [lewscrew] by notlob Jul 24, 2009 (7:38 am)
Replying to: lewscrew (Jul 24, 2009 6:17 am) I would check the vacuum line to the EGR to make sure there is no problem with it. Pop
#155 of 163 Re: 99 F350 EGR System Fault [lewscrew] by mickeymouse2 Jul 24, 2009 (12:48 pm)
Replying to: lewscrew (Jul 24, 2009 6:17 am) If your trouble code is "EGR malfuction" Here are the possible causes: Electrical, EGR, EVR or DPFE, disconected hose or clogged or broken DPFE tube.   You already replaced the EGR so that wasn't it. If it is an electrical problem, ouch very hard to diagnose.   Other causes and most common are DPFE (Differential Presure Fedback EGR sensor) or EVR (Electronic vaccum Regulator to EGR) I know a real mouth full.   1st: If you are not experiencing weird idle changes along with this trouble code, it is unlikely that the EVR is malfuctioning. It could be not working at all and not opening the EGR with vaccum. This is the cheaper sensor too. About $35   2nd: On your exhuast manifold are 2 tubes one bigger than the other leading up to the DPFE. This sensor reads back pressure changes in the exhuast when the EGR is told to open. If the signal is not correct, bingo....t-code. Check to see if the tubes are clogged up or if one of the hoses came off the DPFE sensor. This sensor isnt cheap! If you have an exhuast leak, fix it. Insufficient back pressure in the exhuast can throw this sensor off also.   You seem like a smart guy. After each test repair reset PCM and test drive. Keep track of what you have eliminated as the cause such as the EGR. This may take some time to figure out. I do this for a living and this t-code can be a bastard sometimes. One way of testing the EVR is to temporarely install a vaccum guage inline with a vaccum tee to your EGR and put the guage so you can see it. Drive and look for vaccum being applied and changing by the system while your driving around..   Get back to me if you want me detail how to test the DPFE. I have the right equipment, but it can be tested other ways, its just hard that way. Good luck.
#156 of 163 engine problem by t129 Jul 31, 2009 (6:21 pm)
A few days ago my engine light came on and the engine started missing. Today the engine started missing worse and the light started flashing. After I stopped the engine and restarted it the light was off and it didnt miss anymore. Any ideas what's going on?
#157 of 163 '87 F250 RUNNING BAD by nairb Aug 29, 2009 (12:06 am)
Have an 1987 F250 4x4, 302V8,4sp. trans., reg. cab. The thing runs fine for the  first 1/2hr. or hr. of the day, then it starts running really rough in the low RPM's.  I have to about floor it to take off in 1st gear when I used to take off in 2nd gear.  The RPM's also fluctuate when idilng and sometimes it will just die driving down  the road at which this point I switch to the other tank and that keeps me going  but still runs the same. Checked the timing the plugs, and looked for any bad  vaccuum lines but can't seem to make things any better. Would appreciate any  advice from anyone. Thanks. Replies to this message: notlob (Aug 29, 2009 2:59 am) nairb (Aug 29, 2009 7:19 am) mike9408 (Aug 29, 2009 4:57 am) nairb (Aug 29, 2009 7:23 am)
#158 of 163 Re: '87 F250 RUNNING BAD [nairb] by notlob Aug 29, 2009 (2:59 am)
Replying to: nairb (Aug 29, 2009 12:06 am) sounds like you could be having some vapor lock problems. Replies to this message: nairb (Aug 29, 2009 7:19 am)
#159 of 163 Re: '87 F250 RUNNING BAD [nairb] by mike9408 Aug 29, 2009 (4:57 am)
Replying to: nairb (Aug 29, 2009 12:06 am) If this happened suddenly........check to see if you picked up a bad load of fuel. Does it appear to be using to much fuel (black smoke at tail pipe) Check the Air Filter, replace if necessary. CHECK/REPLACE THE FRAME FUEL FILTER, this is more than likely the problem. If this does not fix it, check the vacuum line to the fuel back pressure regulator and the pressure regulator. Replies to this message: nairb (Aug 29, 2009 7:23 am)
#160 of 163 Re: '87 F250 RUNNING BAD [notlob] by nairb Aug 29, 2009 (7:19 am)
Replying to: notlob (Aug 29, 2009 2:59 am) What do you do about vapor lock?
#161 of 163 Re: '87 F250 RUNNING BAD [mike9408] by nairb Aug 29, 2009 (7:23 am)
Replying to: mike9408 (Aug 29, 2009 4:57 am) It's been doing this for about a month and a half so it's not the fuel. Checked the air filter and its fine. And according to my Haynes manual, F250's w/EFI have non- servicable or replacable fuel filters. Thats what I was thinking the problem could be because I do run both my tanks down to fumes quite often.
#162 of 163 02 f-250 fuel problems? by ahandy Sep 21, 2009 (1:57 pm)
My truck has 142,000 miles on it and recently the truck died for no reason. It happened again about a month later. I replaced the fuel filter and didn't solve the problem. The pump turns on and speeds up as rpms increase. Sometimes it won't stay running, other times it runs like there is no problem. I am so hesitant to take it to the dealership who has misled me in the past. (catastrophic electrical failure) Plus i am hoping to do the repair myself. By the way no error codes
#163 of 163 F-250 RADIATOR PROBLEM? by nairb Oct 15, 2009 (9:39 pm)
Went to check my antifreeze in my truck to see what it was good to (protection  below zero), and when I pulled the gauge out of the radiator neck, it had yellowish  oil-like residue all over it. I know when you blow a head gasket, the oil on the dip-  stick might have H2o/antifreeze on it. Is this possibly the same problem? Any  help is greatly appreciated.Thanks.

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