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Re: '88 B250 running problems
KogonDodge #772214 March 03rd 2021 10:39 pm
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So. last Froday, 5 days ago, I left SW Florida in my Van, arriving in San Diego last night.
While I had some tailwinds west of San Antonio i was getting excellent Fuel economy, all things considered, even before then.

Today I run out to get some supplies. leaving one store, I started the engine, put it in reverse to back out of my parking spot, got about 3 feet and it stalled.

I could not hear fuel pump, but jumpered the ASD relay and there it was buzzing away.
I pulled the engine cover and confirmed no Spark. I ohmed out the primary and secondary coil and it was within spec.

Pull out FSm and Haynes manual and the Hall effect sensor/ Distributor pick up, well one receptacle on teh connector which should have been within 1 volt of battery voltage, was 3+ volts below that.

I then called AAA. First time in 16 years of membership I used the tow service.
I am assuming the engine computer is not firing the Coil.

I was within 7 miles of home, so the tow on a Flatbed was free and within an hour and a half of calling AAA, my Van was home.

I'll take my time and diagnose that coil circuit, but I am leaning that My ECM has failed. Glad it did not do so on the 2600 mile journey completedf in the 4 prior days.

KogonDodge I'll be sending you a PM, I want that ECM you pulled from the yard, even if it does not match part numbers exactly and we are not sure it is viable.

Edit.... Looking at the 1990 rockauto parts list and pics of the ECM with , there is no 14 Pin connector on a 1990 ECM and thus incompatible with mine which has a 14 pin and a 60 pin connector

I need a 4399987:
https://www.rockauto.com/en/moreinfo.php?pk=27684&cc=1073506&jsn=536&jsn=536

And it is listed as OUT OF STOCK.

Might be ordering some Capacitors and seeing if I can return my original to function.

Last edited by wrcsixeight; March 03rd 2021 10:53 pm.
Re: '88 B250 running problems
KogonDodge #772218 March 03rd 2021 11:55 pm
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Whereabouts are you wrcsixeight? I've got that computer in the garage and I can run it over if you are not too far and have no mode of transportation.


1988 B250 Conversion Van
https://i.imgur.com/uQPPuqo.jpg
Re: '88 B250 running problems
KogonDodge #772220 March 04th 2021 12:45 am
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I'm not far off the 5 in Leucadia, but My 1989 b250 '9887' computer has different connectors than a 1990 b250 with a 4557559 number. I thought they were the same in terms of connectors, but was wrong.

I saw the closest Oreillys actually claims to have one in stock for 190$ with 90$ core. Its a Cardone, but so is my current one and it lasted 15 years.

I'm also not yet 100% sure the ECm has failed. It was pouring rain when the flatbed rolled my Van off and I cracked a beer instead.

Thanks for the offer though!

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