So my CJ7 has a 1995 tbi 350, it runs like total dog poo as of lately. It hesitates off of idle with a load on it. And acts like it's misfiring at times. Does anybody know the ins and outs of these motors? I don't feel like messing with it to much. If it's going to cost more than a few hundred bucks to fix I would rather LS swap it.
TBI 350 issues
- Thread starter skippy
- Start date
- Location
- Bountiful, land of rocks
How old are the spark plugs/wires/cap/rotor? These are about as basic of a motor as they can come. (hard to argue against the swap... you'd only get about three times the power or more)
RustEoldtrux
RustEoldtrux
- Location
- Evanston, WY
Try a new fuel filter, it sounds like the engine is starving.
lhracing
Well-Known Member
- Location
- Layton, UT
I have a friend with one in a jeep and it was doing something similar. He chased it for a long time ended up being the distributer, changed that, problem solved.
RockChucker
Well-Known Member
- Location
- Highland
Dumb question...it seems like your cj has been sitting about as long as my tj...any chance the fuel has spoiled and you need to flush the fuel system and put new gas it it?
- Location
- West Haven, UT
Pretty simple system. Typical tune up items (coil, plugs, cap rotor, etc.) and fuel pressure/filter/injectors are culprits
RustEoldtrux
RustEoldtrux
- Location
- Evanston, WY
Probably the cheapest, simplist and easiest thing to do as the first fix is to replace the fuel filter. I just experienced the exact same symptoms with the Vortec 4.3 in my trail buggy caused by the foam insert deteriorating and plugging the filter multiple times. After pulling the foam out of the fuel cell and thorough cleaning, the engine came back to life again.
_Auzzy_
Web Wheeling Extraordinaire
- Location
- Richfield Utah
Check your timing too. My tbi has had a fun habit of slowly advancing up and it experiences the same symptoms
So in the spirit of starting off slow, since I have never tuned this thing up I started there tonight. Got new plugs, wires and cap and rotor installed with no change in runability. I'm going to go through the fuel system tomorrow evening and possibly even verify the ECM is getting 12 volts at all times. Just to rule out possibilities
RockChucker
Well-Known Member
- Location
- Highland
Maybe you just need to blame Aaron?
Fixed it.
This is inevitable but ain't nobody got time for that right meow
As I was buttoning things up last night, I turned the fans off so I didnt have to listen to it run, with the fans off the started up and idled fine. As soon as I turned the fans back on the Jeep stuttered and died. So I Think the fan is pulling enough juice and not letting the ECM stay at 12+ volts. I will verify tonight and then if thats the case start figuring out why the alternator isnt keeping things charged up.
_Auzzy_
Web Wheeling Extraordinaire
- Location
- Richfield Utah
What style fan are you running? My Taurus fan was too much pull for the factory alternator. Those style are only 105amp if I remember right and only get that amperage at mid to high rpms. I had ACE's alternators in yucca build a cool guy 185amp and it's been great, run all my lights, fans, and rear steer and still maintain 14volts on the guage at an idle.
So tonight I checked voltage and it seems to be staying consistent. I also swapped the fuel filter.
Still running like dog poo... LS swap seems like a likely candidate. I'll throw a few more nights at this and see what I can figure out.
Do these TBI motors have any sensors that would cause this issue. Also it wouldn't idle with or without the fan on tonight.
Still running like dog poo... LS swap seems like a likely candidate. I'll throw a few more nights at this and see what I can figure out.
Do these TBI motors have any sensors that would cause this issue. Also it wouldn't idle with or without the fan on tonight.