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Can you diagnose a bad ppm? 1999 f150 xl 4x4. Cop and plug
cop and plug replacement, aic valve, egr valve, dpfe sensor, cam position sensor and we are now trying to find out if the pcm is bad by ohming out each pin for the coil packs. we have a misfire code for cylinders 1,2,3 and 7 and cannot get the pcm to read anything as far as ohms … read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
29,223 satisfied customers
Started running rough, had oil changed. guy told me cylinder
started running rough, had oil changed. guy told me cylinder 6 was showing a misfire. just put new plug and coil pack on. no change. … read more
HDGENE
HDGENE
6,643 satisfied customers
I have an 04 F150 4.6 sohc with 235K. K&N air filter. Around
I have an 04 F150 4.6 sohc with 235K. K&N air filter. Around town it seems to do fine but, if I get on the interstate and get on the gas. I enbd up with a check engine light and the codes read misfire… read more
JOHN aka Eauto
JOHN aka Eauto
self employed
High School or GED
10,909 satisfied customers
I have a 2007 f150 5.4 3v trition engine. I have a slight
I have a 2007 f150 5.4 3v trition engine. I have a slight misfire I would say like a 1/4 of a misfire. When reading the engine with a scanner no misfire codes a present. I even borrow my friends snapo… read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
29,223 satisfied customers
F50: 2004 Ford F150 4.6L and it seems i have an odd problem.
2004 Ford F150 4.6L and it seems i have an odd problem. When i go up slight inclines, it seems i get a misfire but no check engine light. I have tried medium acceleration, no problem. I have tried hea… read more
HDGENE
HDGENE
6,643 satisfied customers
F150 Ex Cab: Ron this is Richard, need help on a 2000 Ford
Hi Ron this is Richard, need help on a 2000 Ford F150 extra cab, 4.6 L engine. After scanning the truck we see that it has a P0306, and a P0401. The coil is not firing on cylinder number six, so we wi… read more
SuperDave
SuperDave
auto technician
101 college hrs
1,481 satisfied customers
f150: ford f150 1998, 8cyl, 4.6 ltr. Error code P0300 "multiple
ford f150 1998, 8cyl, 4.6 ltr. Error code P0300 "multiple random cyclinder misfires. Previously cyclinders 3 and 7. Components already checked/replaced: spark plugs and wires both coils crankshaft pos… read more
Pavlin Koev
Pavlin Koev
Diagnostic Technician
High School or GED
1,069 satisfied customers
1998 f150: bucking..misfire on cylinder 5..coil packs
I have a 1998 f150 4.6, started bucking so I read codes and gave back misfire on cylinder 5. I replaced both coil packs and now it reads misfire on 5 and 6. Sparkplugs and wires seem ok. Any ideas?… read more
snapontech
snapontech
Associate Degree
195 satisfied customers
1997 ford f150: codes for misfire, egr flow..fuel filter intake
i have a 1997 ford f150 with a 4.6 I have been chasing a running problem for weeks . The truck throughs codes for misfire, egr flow .I have changed plugs ,coils ,fuel filter intake gaqskets and still … read more
EricFromCT
EricFromCT
Auto Technician
4,560 satisfied customers
2003 mustang gt: code said cylinders 5,6,7,8 misfire it has tyhe coil
i have a 2003 mustang gt the code said cylinders 5,6,7,8 misfire it has tyhe coil on top of the plug,is it possible for all 4 tyo go out at the same time… read more
A. Penland
A. Penland
Ford Senior Master Technician
Vocational, Technical or Trade School
7,138 satisfied customers
i have a ford f150 4.6 triton v8 truck runnes rough and i took
i have a ford f150 4.6 triton v8 truck runnes rough and i took it to the mechanic he said that the code was ignition problem but since it wasnt bad enough the computer wouldnt give more info last year… read more
Steve
Steve
Ford tech Specializing in electronics
Vocational, Technical or Trade School
6,745 satisfied customers
2003 expedition: cylinders..egr valve..exhaust in the passenger cabin
just replaced spark plug coil packs for cylinders 6 and 8 on a 2003 expedition 4.6 engine. then replaced both vaccum hoses to egr valve today. now I am smelling exhaust in the passenger cabin and the … read more
Scott W.
Scott W.
Diesel, Automatic trans, full line tech
Associate Degree
3,696 satisfied customers
2002 Ford F150: white smoke..exhaust..a test that said misfires in cyl
I have a 2002 Ford F150. It has been starting up with a bad rumbling feeling and white smoke comes out of the exhaust, guys at a shop ran a test that said misfires in cyl. 5 and 6 and unknown error co… read more
Bamaman39
Bamaman39
Ford master diesel Tech.Ford certified
High School or GED
2,286 satisfied customers
99 ford ranger: I get OBD code 306 (misfire on #6 cylinder)..coil pack
I have a 99 ford ranger and I get OBD code 306 (misfire on #6 cylinder). I have 13vdc to the coil pack (I also jumpered it directly to the battery, no difference). There is good continuity between all… read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
29,223 satisfied customers
2001 Grand Marquis: a bad miss..coil packs..replaced along..EGR valve
I have a 2001 Grand Marquis with a 4.6 engine. When I got the car it had a bad miss and all the coil packs and plugs were replaced along with the EGR valve. Shortly after I was getting efficiency code… read more
A. Penland
A. Penland
Ford Senior Master Technician
Vocational, Technical or Trade School
7,138 satisfied customers
2003 expedition: #1 spark plug was blown out 2 months..kit..valves
i have a 2003 expedtion 4.6... the #1 spark plug was blown out 2 months ago.. ford failed with kit for retapping plug. took to a personal mechanic and he was able to get plug in, had to redo valves. f… read more
mustangmike
mustangmike
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
492 satisfied customers
I have a 1997 F150 with a 4.6 engine. About 80000 miles on it.
I have a 1997 F150 with a 4.6 engine. About 80000 miles on it. My problem is that when driveing at highway speed and I push the accelerator down the engine will start missing and the check engine ligh… read more
Jaxer Smith
Jaxer Smith
Owner
Technical
1,272 satisfied customers
2001 ford F150: misses..autozone..gas cap..3) emission below threshold
2001 ford F150, misses when it is raining heavy, or in very wet conditions. I had the codes read at autozone, there were 3. 1) something about a gas cap, I was missing a gas cap, and I replaced that t… read more
joseph carrillo
joseph carrillo
automotive drivability tech
Vocational, Technical or Trade Scho
314 satisfied customers
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Meet the Experts:

Ron

Ron

ASE Certified Technician

25,182 satisfied customers

23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs

Chris (aka- Moose)

Chris (aka- Moose)

Technician

29,223 satisfied customers

16 years experience

John Mc

John Mc

Ford Technician

5,495 satisfied customers

19 years Ford Lincoln Mercury experience

Chuck

Chuck

ASE Certified Technician

1,685 satisfied customers

33 Years Experience,Ford Senior Master,ASE Master,L1 Advanced Engine Performance

Cam

Cam

Journeyman Automotive Technician

10 satisfied customers

GM Grand Master Technician 2007. 14 years Automotive experience.

Mike V.

Mike V.

Auto Service Technician

1,591 satisfied customers

25 years experience on all makes and models, Licensed NYS Inspector.

Richard

Richard

ASE Certified Technician

1,524 satisfied customers

12 years at a Ford Lincoln/Mercury and Jaguar dealer as a technician and shop foreman.

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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