Jor2010dan

Hey i have a 1992 limited xj. I have an autostart on it and ever since i replaced my fuel filter and since it's gotten cold, every time i auto start it in the morning it fails
It tries twice but after 5 secs each time it stops.
New battery
New alternator
New Wiring

Thinking it might be my tps. It was acting up since i first got the heep and i just unplugged it. I ordered a new one and it'll be here soon.

Anythoughts on what else it might be

I do have a crack in my one battery terminal but it is still tight.
Ill get a new one soon

brutalxj

Try the tps and if you still have a check light try O2 sensor or just a tune up. When my tps went out it would still start but it was a stumble start that didn't take that long maybe 2 sec max. And there was a flat spot around 2300 rpms it would slightly miss could barely tell unless it was in N and you were looking for it.

SeriousOffroad

Could be a bad checkvalve in the fuel pump. Do a Leakdown test.

Jor2010dan

how do i do that?

Also, it will start but dies right after when i auto start it in the mornings.

wont stay running till i give it gas when im actually in the car

Dan_in_WA

If your TPS is the problem, the computer has probably stored a code. Code 24, IIRC.

Have you tried reading the codes? Just turn the ignition switch On-Off-On-Off-On, and watch the flashes of the Check Engine light.

Jor2010dan

did that 5 minutes ago.
got a 5x5
so i imagine its not recorded in the compy

Dan_in_WA

Is it just when trying to remote start it that it doesn't start, or is it hard to start when you climb in and twist the key as well?

Jor2010dan

both. it just wants fuel. as soon as i touch the gas, it'll stay starting and idle fine. It might have started right after i replaced the fuel filter. do i need to prime it some how? or what.

Dan_in_WA

My son's '91 is doing this same thing. Haven't had a chance to sort through it yet. But here's what I've done on his, and these don't seem to be the source of the problem.

1. PCM is clear of codes.

2. New cap, rotor and spark plugs, correctly gapped.

3. Timing has been verified as ok.

I've got to head to work on a graveyard shift, I'll check this thread in the morning when I get home.

tjwalker

1. Try that new TPS. You have it ordered anyways and it is a primary suspect.

2. Verify fuel pressure with a gauge while it starts to see if it is staying within spec. Gotta use a gauge here.........

okc4x4

I had a similar issues on my 99 Cherokee. I replaced the TPS with a new on and it didn't help. I replaced the IAC with a new one and Bingo. I would clean and check your IAC. Mine was clean but the pintle was all the way extended. The new pintle was push in most of the way..

Just a thought.
Josh

Jor2010dan

Can ya point me to a thread how to? With pictures? I'd have no idea where to go with fuel pressure

2Evil4U

What he said. Sounds like a failing IAC.

Jor2010dan

Haha totally forgot about this but I did clean it a while back and it still didn't run right. So I unplugged it and its been unplugged ever since. Haha dam 60$ again.. guess it might be worth it

Dan_in_WA

Could be a vacuum leak. If air is getting into the manifold down stream of the IAC, that would simulate the IAC being stuck open.

How fast is your idle when it is warmed up?