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350 TBI misfire, running rich, popping back through TBI

OleCoot

Administrator
Staff member
Joined
Jul 8, 2013
so once again I am having issues with my TBI 350. took 45 minutes yesterday just to get it running good enough to get away from the trailer. once out on the trails it seemed to do well enough for a while, then it would act like its starving for fuel, running rich, and generally like shit. even set the air filter on fire.. (story in itself). shut it off for 5 minutes or so, maybe a bit longer and it would run fine again for a few minutes. SAK5 said he had a very similar issue once and replaced the TPS and MAP sensor. Imma go borrow his code reader and see what codes I have.

anyboy else experienced this and what did you do to fix it?
 

Ramman84

Well-known member
Joined
Aug 3, 2013
LS swap vato I know a guy.

Or 4.0 swap it

Sent from my XT1650 using Tapatalk
 

OleCoot

Administrator
Staff member
Joined
Jul 8, 2013
give me a good running lq4 and wiring for free and I will swap it in.. .otherwise... :flipoff:
 

snick

Active member
Joined
Mar 3, 2016
The ole mans TBI was doing what you discribe the other day minus the fire part. It turned out to be fouled sparkplugs caused by a bad O2 sensor if that helps.

Or you might check that loose nut behind the wheel.
 

Fullsizecrawler

New member
Joined
Jul 11, 2013
Dude all the guessing will not fix it. Get a scanner hooked up to it and find out what's wrong. The TBI set up is really simple set up.
 

OleCoot

Administrator
Staff member
Joined
Jul 8, 2013
We had a scanner on it. 12, 13, and 42 were the codes. We proceeded to troubleshoot accordingly. This aint my first rodeo with tbi motors.

smokin
 
Last edited:

Ramman84

Well-known member
Joined
Aug 3, 2013
I was gonna crack a joke about never seeing it work, but then I remembered I don't have a wheelable rig currently 😫

Sent from my XT1650 using Tapatalk
 

OleCoot

Administrator
Staff member
Joined
Jul 8, 2013
just to update this.. finally found and fixed this. Happened last year at Wolf Caves.

the issue was a broken wire going to the 4 prong connection on the distributor. bought a new pigtail and that fixed it. :why:
 

fourwheelerjeff

Administrator
Staff member
Joined
Jul 9, 2013
i remembered I have to fix a brake line on the red buggy then remembered I have to fix the trailer.