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Chrysler Repair/'85 2.5 fuel inj turbo


QUESTION: Desperate need of a man with expertise who can smooth this thing out and get it on the road, it's a fresh motor but my brother died before he could finish, I will transport vehicle to the right guy

ANSWER: You also told me about the engine:"it's transplanted in a 84 Cherokee, everything is new, but no one here can get it to run smoothly".
I wonder whether your brother updated the engine control system or not? Between '84 and '87 the control computer was in two parts, a power module in the engine compartment and a logic module in the cabin, and to gain an insight into your problems you would need a Chrysler DRB-I (C-4805) fault code reader. If by chance he upgraded the controller to '88 or later then you can get the fault codes either with a DRB-II code reader or just use the ignition switch to get a readout. In the original vehicle the connector port for the code reader was a 6-pin black rectangular socket located near the left strut tower in the engine compartment. Ideally your brother has wired to that port in the '84 Cherokee.
Try doing this with the ignition key: "on-off-on-off-on and leave on" doing that in 5 seconds or less elapsed time. Then watch the instrument cluster to see whether the power loss/check engine light (which remains 'on') begins to flash, pause, flash, etc. If not then probably the earlier system is still in use and you will want to get a code readout at a Chrysler dealer/shop that can do that with a DRB-I or its equivalent. If the light begins to flash then count the number of flashes before each pause; then repeat the process to assure an accurate set of flash counts. Tell me what the counts are.
Getting a fault code readout is the way to start diagnosis of any engine problem and you can do that locally, in Montana. Let me know when you get the two-digit fault code number(s). Without a diagnostic readout all you can do is throw parts at it which is very expensive and frustrating.
Please read the PS below and respond.

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QUESTION: Thank you for the input, nothing has worked for me, this is why I need an expert and am willing to travel to wherever he is, I have tried all dealers, non will help, please get me a tech that can and will do this job, I am willing to pay for the name if need be.

I don't have any one I can recommend, Greg.
Again, do you have any idea about which 'vintage' engine controller is installed? Will you try the ignition switch approach that utilizes the power loss/check engine light? If not, then try joining and asking the same question at theChryslerlebaronclub. There are 2000 members there, some of whom must be living near where you are.
If you would be so kind as to 'rate and nominate' me I would be most appreciative.

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Roland Finston


Get a Free Fast answer to your repair question about a Chrysler/Dodge/Plymouth car, minivan, SUV, or truck. Problems with electronically controlled engines and transmissions as well as body wiring problems are my specialty. This free troubleshoot advice forum helps you diagnose faults, minimize repair costs or do-it-yourself.

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I have do-it-yourself experience (50+ years) and a library of 100 1982-2012 Chrysler factory shop manuals and 20 multi-manual Chrysler Corp. CD's.

I was voted "Top Expert" 2010-2015, here at AllExperts, and have answered 20,000+ questions.


Five decades as a 'do-it-yourselfer' on domestic and imported cars.

Yahoo Autos Group called The Chrysler Lebaron Club (co-moderator)

Advanced degrees in Physics/bruised knuckles

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"Top expert" of 2010, 2011, 2012, 2013, 2014 and 2015 here at Allexperts. Quickest "average response time" at Allexperts (currently no. 1).

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