new Jeep new problem

[Papa_Jon]

1998 Jeep 4.0 auto
got 2 issues
1st when you pull up to a stop light it dies, Just like you turn key off. fires right back up then will idle
2nd when you give it gas , WOT or trying to speed up to pass it misses, like fuel is shut off rpms jump from 0 back to normal. if you ease throttle it don't do it.
no check engine light no faults

 

[Papa_Jon]

also How hard is to swap a d44 in rear one came with it gear 488 front is already changed

 

[Degausser]

also How hard is to swap a d44 in rear one came with it gear 488 front is already changed

My '98 has the exact same issues. The 44 swap is fairly easy, nut the parking brake cables probably won't work.

 

[Jason W.]

I would clean the idle air control and the throttle body first, also check for vacum leaks around the throttle body, might be useless info but it has helped me figure out many issues.

 

[Degausser]

Can you hear anything that may be a vacuum leak?

 

[VortecJeep]

idle air control valve or the throttle position sensor. I've had to replace both on mine at different times.

 

[Papa_Jon]

guess I will hook up scanner tomorrow and see if i can tell what IAC or TPS is doing

 

[WARRIORWELDING]

keep us posted my Xj has the same issues. I don't have a scanner but it doesn't set a check engine light. I can't imagine why not though! Its so violent you could head butt the dash at times and it goes completely dead, yet no light or stored codes. I borrowed a really cheap scanner from my father in law and got the neutral safety switch deal. Got that fixed but she still bucks like an unbroken horse and lays down like a mule!

 

[Granny]

The 44 swap is fairly easy, nut the parking brake cables probably won't work.

I don't know if your '98 is any different, but when I built Granny 2 I used the stock ('95 YJ) parking brake cables on the Scout 44 axle. I used a small hose clamp to collapse the prongs that hold them in the backer plate... pulled them out of the 35 and poked them back into the 44... they worked just fine. Hope that helps!

 

[Papa_Jon]

Update: ended up being the TPS and netrual safety switch

 

[WARRIORWELDING]

thanks guess I'll be buying a tps next

 

[Papa_Jon]

UPDATE::: Well the TPS and ETC switch fixed the stalling issuse. Now I am getting volatage to high on Tps and ETC as well as TCC code.
Replace all engine grounds cleaned all mounts for grounds.
On scanner volts for TPS are .92 at idel and at WOT 4.5 volts same with meter
The ETC seems to stay around 1.2 to 2.5 volts

 

[WARRIORWELDING]

ETC? whats that stand for I'm drawing a blank? Electronic Throttle Control? Don't sound right its got cables!

 

[Papa_Jon]

ECT sorry