Another MJ build thread ...

[sneakyjap96]

I think I already replaced it, but I have more to try to swap in just for the hell of it . it tested fine. pretty sure I put a new one in from my last rig.

That's weird tho seems for sure electrical to due with fuel

 

[blondejoncherokee]

That's weird tho seems for sure electrical to due with fuel

yeah. If I keep cranking it and flooring the gas pedal it will eventually go, but can take up to 5 mins... annoying but ill keep at it.

 

[sneakyjap96]

Sounds like vapor lock issue! Or fuel pressure regulator

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[blondejoncherokee]

Sounds like vapor lock issue! Or fuel pressure regulator

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could be . FPR is newer, its not the stock one, I could try hood vents and maybe another new FPR...

I drove it for 100 miles over a week.then I drove it to my buddies house down the street and its dying all the time again

 

[sneakyjap96]

Dies all the time or just after its warmed up??

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[blondejoncherokee]

It is random. Sometimes once every 4 months lately been dying all the time. After warm.

 

[blondejoncherokee]

damn thing is still dying.

Anyone know a good auto electric place in sacramento ? I feel like Ive tried everything . its way too intermittent to get it to happen in the garage to accurately test things when it dies and wont start. I'm kinda over it.

 

[831_xj]

Wanna work a trade on it?

 

[831_xj]

Seriously though... I feel bad you've been tossing shit at this for a while now.

 

[blondejoncherokee]

yeah I have a bunch of money into this rig. if Im gonna sell it Id want it running good to get top dollar. I love this rig, but its really starting to piss me off.

 

[blondejoncherokee]

So the mj runs awesome and drove great for 1.5 hours tonight but the TC never locks. We scanned it and the transmission thinks the brake pedal is always pressed.
Thanks to spencer for bringing his snap on scanner over. Everything else reads amazing and it has tons of power

 

[Goose_XJ88]

Nice. Glad you're finially making some progress on its running issues.

 

[blondejoncherokee]

Ordered new brake light switch. Going to try to figure out the wiring too. Its been hacked up

 

[Johnnie Walker]

So the mj runs awesome and drove great for 1.5 hours tonight but the TC never locks. We scanned it and the transmission thinks the brake pedal is always pressed.
Thanks to spencer for bringing his snap on scanner over. Everything else reads amazing and it has tons of power

TC lock up switch, and forget about it.

 

[blondejoncherokee]

Yeah but that doesnt fix the fact that my tcu thinks my brake pedal is always pressed .

 

[blondejoncherokee]

But the tc lockup switch is the plan if i cant figure it out

 

[blondejoncherokee]

It is starting to make sense why it would run in 1st only with the TPS unplugged--- converter wont lock up with the thing in 1st. so I am thinking the goofy brake light switch wiring is intermittently sending a weird signal to the TCU that the brakes are off and its then locking the TC ?
Im going to cut the TC out of the system and put it on a switch.

 

[blondejoncherokee]

MJ Died, wont start, has spark and fuel. Weird. hoping I can figure it out .

 

[iluv83vettes]

MJ Died, wont start, has spark and fuel. Weird. hoping I can figure it out .

have air?

 

[blondejoncherokee]

have air?

good question.
I am going to check the air filter to make sure its not clogged with a rats nest.

spencer came over tonight and we scanned it again- my coolant temp sensor was reading negative temperatures, and I have been reading that a bad coolant sensor can dump fuel and kill the motor. I ordered a new one and I am going to see if that helps out at all.