cylinder misfire, injector misfire, coil error
Login  | |
|
cylinder misfire, injector misfire, coil error - 5/10/2008 10:48:26 AM
|
|
|
CPTAFW163
Posts: 266
Joined: 6/4/2004
From: New Jersey
Status: offline
|
One of 7 errors the dealership said when diagnising my engine (oh yeah, an evap code). the check engine light was on and i noticed a slight vibration. THey refused to work on the truck because of my "radical setup."
Here are the things i have done since:
Changed the spark plugs: Autolite 3923s .04 gap to some new Accel U grooves I had gapped to .036. Made the problem worse.
Changed the coil back to stock coil. Same thing
With the stock coil i disconnected the MSD with my quick connects so the ignition was stock. It started up easier, but still the same problem.
BTW, i only reset the computer after the spark plug change. I didn't do it between the coil change and MSD disconnect. Gonna do that soon.
Can someone tell me about "twisting the distributor"? I tried that when i did the first troubleshooting and the problem got worse. Wich way do i have to twist it? Although when i did twist it i didn't feel it move at all.
No engine lights were on after i changed the wiring harness from the fire. The engine light came on 2 months later. It was running fine, now this happens. With the autolites in the misfire was hardly noticeable except for idle.
THe code about the injectors...anyone know if new connectors would do the trick? Just splice them into the old connections. I am running the Ford blue top 24#ers.
Also, could it be the fuel pump? I am at 145K and haven't had it replaced ever. Could that be the problem? My plugs show rich at idle and lean at WOT. The white part of the electrode is BONE WHITE. There is soot around the rim of the spark plugs.
Thats all i got for now.
--Dan
_____________________________
Green 1996 SLT Laramie 4x4 5.2, Mopar PCM, F1TE-D9A 24# injectors, MSD 6AL, Hypertech coil, Fastman 50, Edelbrock Ceramic TES headers, Magnaflow exhaust sidepipes, 3" rancho suspension lift, 33s, Black AMC rims
|
|
|
|
|
|
|
RE: cylinder misfire, injector misfire, coil error - 5/10/2008 11:01:22 AM
|
|
|
CPTAFW163
Posts: 266
Joined: 6/4/2004
From: New Jersey
Status: offline
|
Just remembered that the IAC was the only sensor i didn't replace on the throttle body after the fire. It was a bit "singed" but it worked. I remember it being sooty, and i am gonna try getting a new one. I noticed more of the misfire after it came back from the dealership and they fixed my vac lines going into the dash for my vent controls. THey did that for free, and didn't even charge for the diagnostic. So i am thinking the vac leak is doing something. However, it doesn't explain the misfiring during throttling. The cap/plugs/wires/rotor were replaced after the fire (about 2 months ago).
I am gonna keep doing stuff, but any recommendations would be great. Also the answer to "twisting the distributor" would be great.
All this started to happen after i added a can of "engine restore" to the oil. I noticed i added a quart too much of oil to the engine as well. Can that have something to do with it?
- I read in haynes that uneven compression could cause this.
< Message edited by CPTAFW163 -- 5/10/2008 12:02:03 PM >
_____________________________
Green 1996 SLT Laramie 4x4 5.2, Mopar PCM, F1TE-D9A 24# injectors, MSD 6AL, Hypertech coil, Fastman 50, Edelbrock Ceramic TES headers, Magnaflow exhaust sidepipes, 3" rancho suspension lift, 33s, Black AMC rims
|
|
|
|
|
RE: cylinder misfire, injector misfire, coil error - 5/10/2008 3:16:43 PM
|
|
|
CPTAFW163
Posts: 266
Joined: 6/4/2004
From: New Jersey
Status: offline
|
Alright,
I changed the IAC and it didn't help. It seems the more i do the worse this gets.
I am gonna try some champion plugs tomorrow to see if that works. if it doesn't i think i might have a bent valve.
BTW, i noticed my evap solenoid was on updide down. i switched that so the vac line was going to the port next to the MAP sensor, not to the evap. But that didn't help either.
--Dan
_____________________________
Green 1996 SLT Laramie 4x4 5.2, Mopar PCM, F1TE-D9A 24# injectors, MSD 6AL, Hypertech coil, Fastman 50, Edelbrock Ceramic TES headers, Magnaflow exhaust sidepipes, 3" rancho suspension lift, 33s, Black AMC rims
|
|
|
|
|
RE: cylinder misfire, injector misfire, coil error - 5/10/2008 6:21:45 PM
|
|
|
CPTAFW163
Posts: 266
Joined: 6/4/2004
From: New Jersey
Status: offline
|
Right now its down to just the Coil error and the Injector #8 error. I changed my coil to the stock coil and that kept the engine light off for about 4 miles. Then once I floored it for a while, the light came on and back to stumbling, but not as much.
I am thinking the fuel pressure regulator (rockauto calls it the dampener). If it only does it at WOT, then it must be a fuel delivery problem. i am gonna crack the distributor cap tomorrow and check it out.
Changing back to autolites helped out too.
--Dan
_____________________________
Green 1996 SLT Laramie 4x4 5.2, Mopar PCM, F1TE-D9A 24# injectors, MSD 6AL, Hypertech coil, Fastman 50, Edelbrock Ceramic TES headers, Magnaflow exhaust sidepipes, 3" rancho suspension lift, 33s, Black AMC rims
|
|
|
|
|
RE: cylinder misfire, injector misfire, coil error - 5/10/2008 6:39:18 PM
|
|
|
aim4squirrels
Posts: 2213
Joined: 7/23/2007
From: Texas
Status: offline
|
Did you ever check the catalytic converter?
don't you need a reflash to run bigger injectors? I know you have the Performance PCM, but I don't know if it can map those injectors correctly.
Ford rates their injectors at 24lbs with 39psi at the rail. The ram provides 49psi so you're actually flowing more like 30lbs/hr.
< Message edited by aim4squirrels -- 5/10/2008 6:46:57 PM >
_____________________________
2001 1500 5.2L long bed:
SCT
4.10s
50mm TB
1.7 HS RR
3" exhaust si/so
Round A/C
Modified Keg
MSD ignition
|
|
|
|
|
RE: cylinder misfire, injector misfire, coil error - 5/11/2008 11:47:23 AM
|
|
|
CPTAFW163
Posts: 266
Joined: 6/4/2004
From: New Jersey
Status: offline
|
Hmmm,
The truck never had this problem for the past 5 years when i bought it with those injectors. I did however change the TB to a fastman after the fire.
I changed the coil back to stock and that helped out for 4 miles, then the engine light came back on. i thought i had it fixed.
I am gonna get a fuel pressure gauge and put it into the fuel rail to test my fuel pressure. The truck has 145K and the fuel pump/dampener have never been replaced. I think its about time it is replaced.
I might have to take the fuel rail off and check to see if anything is clogged in there. It doesn't run that bad except if it goes over 2500 RPM, then its a bit more noticeable. I can't believe the change i got when switching back to autolites. I am gonna have a look at the distributor today even though i changed it 2 months ago.
My cat was gutted, according to the guy i bought the truck from, and when i tap it it sounds hollow. But I think i am gonna have it completely taken off if the fuel pressure is good. Then it must be the cat.
Should i go y pipes or magnaflow cat? Emissions aren't a problem for an Oklahoma registered truck.
--Dan
BTW, how did the injectors turn out? I don't think you need a reflash. However, i was just thinking that the computer will read rich and keep reducing the fuel pressure. But i had the same injectors on before the fire and they were just fine. The truck ran well after the fire with no chekc engine light for about 700 miles. Then this.
< Message edited by CPTAFW163 -- 5/11/2008 12:00:15 PM >
_____________________________
Green 1996 SLT Laramie 4x4 5.2, Mopar PCM, F1TE-D9A 24# injectors, MSD 6AL, Hypertech coil, Fastman 50, Edelbrock Ceramic TES headers, Magnaflow exhaust sidepipes, 3" rancho suspension lift, 33s, Black AMC rims
|
|
|
|
|
RE: cylinder misfire, injector misfire, coil error - 5/11/2008 2:52:59 PM
|
|
|
CPTAFW163
Posts: 266
Joined: 6/4/2004
From: New Jersey
Status: offline
|
Just checked the fuel pressire. it was 40 at prime and 49 at idle. It doesn't rule out the fuel system because there could be a blockage in the fuel line on the other side (where the #8 injector is).
Howeve, i seafoamed the engine and it seemed to help. I reset the computer and let it idle for a minute with no more check engine light. I think this might be a CAT problem because i have been noticing kinda sluggish acceleration even after changing the coil/cap/rotor/plugs/wires and adding the MSD.
If a gutted cat was gutted "wrong" can it still get clogged?
--Dan
_____________________________
Green 1996 SLT Laramie 4x4 5.2, Mopar PCM, F1TE-D9A 24# injectors, MSD 6AL, Hypertech coil, Fastman 50, Edelbrock Ceramic TES headers, Magnaflow exhaust sidepipes, 3" rancho suspension lift, 33s, Black AMC rims
|
|
|
|
|
RE: cylinder misfire, injector misfire, coil error - 5/11/2008 3:09:00 PM
|
|
|
aim4squirrels
Posts: 2213
Joined: 7/23/2007
From: Texas
Status: offline
|
If the guy before you just poked at it and didn't remove the pieces it's possible that a larger piece turned sideways and is clogging it up. I've also seen pics of a failed cat where the honeycomb inside was a just melted lump of stuff in the center of the cat.
_____________________________
2001 1500 5.2L long bed:
SCT
4.10s
50mm TB
1.7 HS RR
3" exhaust si/so
Round A/C
Modified Keg
MSD ignition
|
|
|
|
|
RE: cylinder misfire, injector misfire, coil error - 5/11/2008 5:20:08 PM
|
|
|
CPTAFW163
Posts: 266
Joined: 6/4/2004
From: New Jersey
Status: offline
|
Well, thats the last thing i can thing of. Also with the debris from the fire, it is possible that some of the soot and residue went in the intake, through the exhaust and clogged the cat. I also seafoamed it to get any other residue off the valvetrain. That could cause a misfire. Also i noticed my #8 spark plug had some small burrs on it like a valve was hitting it. They were hardly noticible, but i hope the valve isn't busted.
Is replacing a valve something I can do? I never popped a head before. I assume it will take a while, since its my first time, but i am apprehensive about it because i don't know how to put the rockers back on properly...unless its just bolt and go.
--Dan
_____________________________
Green 1996 SLT Laramie 4x4 5.2, Mopar PCM, F1TE-D9A 24# injectors, MSD 6AL, Hypertech coil, Fastman 50, Edelbrock Ceramic TES headers, Magnaflow exhaust sidepipes, 3" rancho suspension lift, 33s, Black AMC rims
|
|
|
|
|
RE: cylinder misfire, injector misfire, coil error - 5/11/2008 6:07:40 PM
|
|
|
Thefiremon
Posts: 21
Joined: 8/10/2006
Status: offline
|
Ok have truck same problem only its worse at low RPM's. Knocks like it is starving for fuel. Fuel pressure at prime is 45 and 53 running. Is that too high (Haynes says 35 to 45) also the needle is vibrating it will vibrate from 50 to 55. Does that sound like a sending unit?
|
|
|
|
|
RE: cylinder misfire, injector misfire, coil error - 5/11/2008 7:24:44 PM
|
|
|
CPTAFW163
Posts: 266
Joined: 6/4/2004
From: New Jersey
Status: offline
|
On the fuel pump there is a fuel pressure regulator (rockauto says fuel pressure dampener). THat might be faulty so it isn't letting the fuel pass until the pump goes harder.
It really shouldn't make a difference. My friend had a 5.0 mustang and he was running 70PSI for his setup. It worked fine, but everyone was like WTF.
After the seafoam treatment my check engine light has not come on...until i floored it to 4200RPM. However, there is no stumbling. I think the cat is the culprit. The guy i bought it from may have cracked off all the ceramic and left the metal honeycomb. Now it must be a ball of molten metal.
My truck just had stumbling on idle, then smoothed out as i drove it. THen i changed spark plugs and it got worse. i changed them back and it smoothed out again. now there is no stumbling and an engine light. So it must be the cat.
When i seafoamed i heard a PING coming from the CAT. Maybe there was something stuck to a valve and it went out the exhaust. But the cat/02 sensors must be messed up. All the soot the engine sucked in from the fire could not have helped those sensors. I am gonna get Autozone to ODBII test it again this week. Guarantee it is the O2 sensors. Until then i am riding my motorcycle. But the truck runs great.
I woult get some seafoam.
One thing about seafoam in a 1996. Should i have used half a can on the brake booster side, then the rest on the PCV side? I am thinking of the divider not letting all that seafoam goodness going to the other side. I already used the whole can on one side.
For 8 bucks, the seafoam couldn't hurt. It can clean out the cat some too.
I am just glad i narrowed it down to one thing basically. It would have sucked if there was a shot in my wiring.
--Dan
< Message edited by CPTAFW163 -- 5/11/2008 7:35:23 PM >
_____________________________
Green 1996 SLT Laramie 4x4 5.2, Mopar PCM, F1TE-D9A 24# injectors, MSD 6AL, Hypertech coil, Fastman 50, Edelbrock Ceramic TES headers, Magnaflow exhaust sidepipes, 3" rancho suspension lift, 33s, Black AMC rims
|
|
|
|
 Today's Posts
Most Active Topics
Make A Donation
Forum Rules & FAQ
RSS Feeds
SRT Forums
Race News
Dodge Prices
Dodge Trucks & SUVs
Ram  Dakota
Durango Nitro
Dodge Cars
Avenger Intrepid
Caliber Magnum
Challenger Neon
Charger Stealth
Daytona Stratus
Dodge Viper
Advertising Info
|
Contact Us |
Link To Us |
Sitemap |
Archive |
Advertising |
Automotive Directory |
About Us |
Dodge Links |
Legal |
Privacy Policy |
© Dodge Forum
Harley Davidson |
Ford Mustang Forums |
Dodge Challenger
Dodge Forum .com is not affiliated with or endorsed by Daimler Chrysler.
|
Printable Version
