99 cummins issue

[nick122590]

99 2500 cummins. automatic. wont start. wait to start light just flashes and it will just crank. mechanic said he thinks its the ecu.. but that's an expensive guess. any thoughts? we got it to start a couple times by disconnecting the batteries.

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[bikrboy128]

i assume the truck is sitting outside? try disconnecting the ECU and bringing it indoors to warm it up for a few hours. then get back out and try it.
everytime there's a cold snap there's always a chrysler computer that takes a shit

 

[nick122590]

have you looked at where the ecu is on these trucks? lol that may take a while. and this happen right before it got cold out

 

[RICH17]

The ECU on these things are junk.

 

[nick122590]

so you think that's what it is to? the cheapest ive found is 600 for a rebuilt... that was 500 miles away to...

 

[RICH17]

Check to make sure the PCM have all good power and grounds going to it.

 

[nick122590]

Check to make sure the PCM have all good power and grounds going to it.

we did. mechanic just said computer... so I was thinking oh the one on the firewall...lol

 

[RICH17]

I asked one of the guys at work and he said PCM as well. He just bought one too and hopes to not have to do it anytime soon

 

[nick122590]

pcm is ok. can you ask where he bought his and how much?

 

[Jokerzl]

Cumminsforum.com

Answer all your questions

 

[nick122590]

im not signing up to ask a single question. ive looked through it already. seems to be the ecm

 

[Jokerzl]

You would be surprised what i read on a similiar situation your having.

Check your pin connections clean them up. If an ecu is bad it wont ever respond just by unplugging and hooking up batteries shouldnt make a difference. At least i know when a ecu is fried or fries or is shot it just dont respond.

 

[daturbosix]

where is the truck? have you tried all the stupid simple things?
and if a mechanic already said it needs a ECU, why are you asking about other possibilitys?

 

[nick122590]

You would be surprised what i read on a similiar situation your having.

Check your pin connections clean them up. If an ecu is bad it wont ever respond just by unplugging and hooking up batteries shouldnt make a difference. At least i know when a ecu is fried or fries or is shot it just dont respond.

it had a superchip on it... took a while to even get it off because it wouldn't read it. scanner cant pick up any codes either...

where is the truck? have you tried all the stupid simple things?
and if a mechanic already said it needs a ECU, why are you asking about other possibilitys?

its here in iowa... he said that's the only thing he can think of. its a small shop (buddy of mine)

 

[bikrboy128]

no communication....no start....cold shitty weather....chrysler product
sounds like you need to buy an ecm

 

[G_T_O]

Also have seen pcms go bad in those and about every other Chrysler product!

 

[Jokerzl]

Have it reflashed if that dont work then change the pcm.

Your new pcm will have to be reflashed anyway.

 

[DynaSlim]

Clean all the ground's and the batteries connections.

 

[DynaSlim]

Ecm pcm injection pump any gauges? A bad sensor somewhere?

 

[nick122590]

Have it reflashed if that dont work then change the pcm.

Your new pcm will have to be reflashed anyway.

we just replaced the pcm since he just said computer and I thought the one on the firewall lol.

anyone have a hookup on a ecm?

 

[nick122590]

Ok guys....the amp and sub were removed... And now the motherfucker runs flawless... Any ideas?

 

[SRT41320]

some sort of short in the amp drawing voltage cause irractic signal voltages? how was it hooked up? directly to battery?

 

[nick122590]

ya nevermind. I april fooled myself. it went 2 days running good. now its back to being broke.... its going to dodge.

 

[RICH17]

Because Chrysler