Need Help With Fuel Injection Problems - Pirate4x4.Com : 4x4 and Off-Road Forum

BuckNBronco · 10-08-2002, 08:18 PM

PLEASE IF YOU HAVE ANY IDEAS LET ME KNOW

I HAVE A 258 IN LINE 6 WITH THE J.F.I. ELECTRO MOTIVE FUEL INJECTION ON IT. IT STARTED RUNNING ROUGH ON THE CON ON THE 4TH, BUT MADE IT HOME. LAST TIME I WENT IT GOT WORSE AND NOW IT WONT HARDLY RUN AT ALL. IT SEEMS TO IDLE DECENT BUT AT HIGH RPMS IT SPITS SPUTTERS AND BACK FIRES THEN DIES. I HAVE TALKED TO OTHERS AND TRIED SOME THINGS BUT NEED SOME MORE ADVICE I HOPE SOMEONE ELSE HAS HAD THIS PROBLEM. THANKS LETME KNOW

BUCK

CJ5-Man · 10-08-2002, 09:50 PM

http://www.tamor.org/techreports/jeep/efi/default.htm

theres some troubleshooting info there at the bottom. might help

BuckNBronco · 10-09-2002, 07:10 PM

ttt

Jakesteramalamajama · 10-10-2002, 05:38 AM

SOUNDS LIKE YOU"RE NOT GETTING ENOUGH FUEL!!!!! CHECK YOUR FUEL FILTER FOR CRAP AND YOUR FUEL PUMP FOR PRESSURE OUTPUT!!!!!

WHY ARE WE YELLING!?!?!?!?!?!?

HTH,
JAKE

Rokmycj · 10-11-2002, 05:59 AM

Make sure all of your sensors are hooked up and are working correctly. I had a friend with the mopar kit that had about the same problem, and he changed to throttle positioning sensor to fix it. I would check what code the computer is giving you. It will be the same as the factory codes and you can find them in a service manual.
Joe

Randall Edge · 10-11-2002, 08:45 PM

I've had 3 different FI probs in the past few months.

'00 TJ would run fine, but every few days the check engine light would come on. Bad O2 sensor.

'97 GC intermittently ran rough. It would lean out and backfire. Bad O2 sensor.

'94 Isuzu Rodeo intermittently ran rough. It would run rich, but it only did it on the road so I never smelled raw fuel. I finally noticed the black ring on the tailpipe was getting rather thick. I pulled a lean exhaust code from the computer. Bad O2 sensor.

Sounds like yours is running lean. Either your not getting enough fuel to the injectors or something is telling the computer to run lean.

BuckNBronco · 10-11-2002, 08:57 PM

thansk for you help guys ill try it keep bringing me ideas i will post when i find what it is

vingerroon · 10-13-2002, 10:12 PM

Double check your fuel pressure.
If the pump is going bad it will be fine at idle but will fart out when you need the volume at higher speeds.

BuckNBronco · 10-15-2002, 06:59 PM

ttt

BuckNBronco · 10-17-2002, 07:36 PM

does anyone know any good mechanics in the antioch or oakley area that could help me and be honest with me i cant figure this one out. if you do let me know thanks so much
buck

Doc Johnson · 10-18-2002, 07:47 AM

Possibly Fuel pressure, Unlikely the Timing curve, Bad Fuel injectors, Clogged Fuel filter, Hard to tell.

10-08-2002, 08:18 PM	#1 (permalink)
BuckNBronco Registered User Join Date: Feb 2002 Member # 10331 Location: South Lake Tahoe, CA Posts: 49	Need Help With Fuel Injection Problems PLEASE IF YOU HAVE ANY IDEAS LET ME KNOW I HAVE A 258 IN LINE 6 WITH THE J.F.I. ELECTRO MOTIVE FUEL INJECTION ON IT. IT STARTED RUNNING ROUGH ON THE CON ON THE 4TH, BUT MADE IT HOME. LAST TIME I WENT IT GOT WORSE AND NOW IT WONT HARDLY RUN AT ALL. IT SEEMS TO IDLE DECENT BUT AT HIGH RPMS IT SPITS SPUTTERS AND BACK FIRES THEN DIES. I HAVE TALKED TO OTHERS AND TRIED SOME THINGS BUT NEED SOME MORE ADVICE I HOPE SOMEONE ELSE HAS HAD THIS PROBLEM. THANKS LETME KNOW BUCK

10-10-2002, 05:38 AM	#4 (permalink)
Jakesteramalamajama Registered User Join Date: Jun 2001 Member # 5577 Location: Nowhere Posts: 1,783	SOUNDS LIKE YOU"RE NOT GETTING ENOUGH FUEL!!!!! CHECK YOUR FUEL FILTER FOR CRAP AND YOUR FUEL PUMP FOR PRESSURE OUTPUT!!!!! WHY ARE WE YELLING!?!?!?!?!?!? HTH, JAKE __________________ It's all here before your eyes / Safety is a big disguise / That hides among the other lies

10-11-2002, 05:59 AM	#5 (permalink)
Rokmycj Registered User Join Date: May 2000 Member # 773 Location: Pilot hill, CA Posts: 793	Make sure all of your sensors are hooked up and are working correctly. I had a friend with the mopar kit that had about the same problem, and he changed to throttle positioning sensor to fix it. I would check what code the computer is giving you. It will be the same as the factory codes and you can find them in a service manual. Joe __________________ miscellaneous debris on four tires AKA Jeep

10-11-2002, 08:45 PM	#6 (permalink)
Randall Edge Registered User Join Date: Jul 2002 Member # 12992 Location: Savannah, Ga. Posts: 258	I've had 3 different FI probs in the past few months. '00 TJ would run fine, but every few days the check engine light would come on. Bad O2 sensor. '97 GC intermittently ran rough. It would lean out and backfire. Bad O2 sensor. '94 Isuzu Rodeo intermittently ran rough. It would run rich, but it only did it on the road so I never smelled raw fuel. I finally noticed the black ring on the tailpipe was getting rather thick. I pulled a lean exhaust code from the computer. Bad O2 sensor. Sounds like yours is running lean. Either your not getting enough fuel to the injectors or something is telling the computer to run lean. __________________ '48 Willys Truck.....sorta......

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10-08-2002, 09:50 PM	#2 (permalink)
CJ5-Man Registered User Join Date: Apr 2001 Member # 3976 Location: College Station, Tx Posts: 1,475	http://www.tamor.org/techreports/jeep/efi/default.htm theres some troubleshooting info there at the bottom. might help

10-09-2002, 07:10 PM	#3 (permalink)
BuckNBronco Registered User Join Date: Feb 2002 Member # 10331 Location: South Lake Tahoe, CA Posts: 49	ttt

10-11-2002, 08:57 PM	#7 (permalink)
BuckNBronco Registered User Join Date: Feb 2002 Member # 10331 Location: South Lake Tahoe, CA Posts: 49	thansk for you help guys ill try it keep bringing me ideas i will post when i find what it is

10-13-2002, 10:12 PM	#8 (permalink)
vingerroon Registered User Join Date: Jun 2000 Member # 1087 Location: Paso Robles,Ca Posts: 91	Double check your fuel pressure. If the pump is going bad it will be fine at idle but will fart out when you need the volume at higher speeds.

10-15-2002, 06:59 PM	#9 (permalink)
BuckNBronco Registered User Join Date: Feb 2002 Member # 10331 Location: South Lake Tahoe, CA Posts: 49	ttt

10-17-2002, 07:36 PM	#10 (permalink)
BuckNBronco Registered User Join Date: Feb 2002 Member # 10331 Location: South Lake Tahoe, CA Posts: 49	does anyone know any good mechanics in the antioch or oakley area that could help me and be honest with me i cant figure this one out. if you do let me know thanks so much buck

10-18-2002, 07:47 AM	#11 (permalink)
Doc Johnson Banned Join Date: Aug 2002 Member # 13299 Location: Bloomington, IN Posts: 432	Possibly Fuel pressure, Unlikely the Timing curve, Bad Fuel injectors, Clogged Fuel filter, Hard to tell.