scanning the dodge intrepid engines

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scanning the dodge intrepid engines

Unread postby Icertainlywas » Wed Sep 09, 2009 11:55 pm

It's been a steep learning curve for me as I tried to figure out an electrical problem in the radiator fan part of the conversion lesharo. We have a 94 Dodge Intrepid (Chrysler) under our 88 Lesharo hood. I had to research where to get more info. Found out there's a 2 inch thick dealership manual "1994 Service Manual/New Yorker, LHS, Concord, Intrepid and Vision" available used on Ebay ($15)for the dodge intrepid engine that was very useful, and has much better wiring diagrams than the chiltons. Also it's one inch thick companion book, "1993-1994 3.3L/3.5L Electronic Fuel Injection (SFI)" has been very useful. It cost me about $7.50 on the used market. However the second book as I read it made it clear that a scanner was going to be required to help trace this problem I had. Researching scanners was a couple days work for me on the old slow dial up connection. After some reading I discovered what most of you must already know, that after 1996 all the engines of all american car makers were put on a standardized system called obd 2. And all the plug in ports for scanners are now standard, and aftermarket obd 2 scanners are blossoming and can be had for as little as $40.
However, cars before 96 had their own particular plugs, fords had one kind, chrysler had more than one kind. GM had theirs. I took a chance ordering an AutoXRay Ez-Scan 3000 which claimed to read all the sensor outputs for 80's and pre 96 vehicles, and had 4 different kinds of connector adapter plugs. It was around $80 off Amazon. Naturally upon getting it I found it didn't connect to our plug under the steering wheel... and it turns out that this one was little used by Chrysler... I was told just a couple years it was used. By our local Electronics Specialists shop I was told only the dealership DRB scan tool, and the Snap on Scan tool could handle reading this rig. Both those scanners run in the thousands of dollars. But I called the customer service rep for Autoxray, and they quickly sent me a crosswiring diagram that allows the SCI plug to be attached to the LH plug for the Dodge intrepid, and then to our amazement, we got to watch the outputs of each of our sensors while the engine idled, and to clear codes during the process of trying to locate a difficult wiring problem. Suddenly the second book became usable. The feeling of power you get when you can see all your sensor outputs is sort of fun, even though you realize you still gotta use the old diagnostics once you know that information, and track down what the results are from that set of resistors that were soldered into the line by the prior owner, and were making the radiator fans come on so late that the engine is in the danger zone. Scanners don't do it all... and the books I mentioned actually list what they Won't do, and give diagnostics for finding those things as well. I know I've still got a huge lot to learn, but wanted to share this with those of you who may be hesitating to venture into the world of scanners. See for me everything about cars is new, so I'm starting from scratch with each new problem. For you who already know engines, this scanner stuff must be fun! So I'm really pleased and my rig is on the road again, and the costs of the tools was pretty minimal compared to the costs of hiring out the work.

Roberta
86 Itasca Phasar 2.2 gas engine (8 years)
88 Lesharo/dodge conversion
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Icertainlywas
 
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Re: scanning the dodge intrepid engines

Unread postby Icertainlywas » Thu Sep 10, 2009 12:11 am

Oh yeah as an afterthought, one snag I ran into with the scanner was that they needed to know the 8th number/letter in the VIN code for the dodge intrepid to interface with the correct scanner info.
Naturally i have no way of knowing the VIN number on the vehicle the engine was taken from. But some research turned out this much.... if You have a 1994 or 95 3.3L dodge intrepid engine, all the VIN's will have the letter T as the 8th VIN digit. If you have a 3.5L dodge intrepid you'll see the letter F in that spot. That info, plus the year of the engine, is all the scanner needed to know in order to interface.
If you are considering doing a conversion... keep your VIN number on your old rig along with the engine.
86 Itasca Phasar 2.2 gas engine (8 years)
88 Lesharo/dodge conversion
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Re: scanning the dodge intrepid engines

Unread postby Larry » Thu Sep 10, 2009 11:32 am

Roberta, that is a well written and very professional presentation. As I said, this DODGE CONVERSIONS SPOT IS JUST THE PLACE FOR IT. It wouldn't hurt for the GM converters to also read it, has a lot of stuff that would apply.
Congratulations on a very good post.
Larry S
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Re: scanning the dodge intrepid engines

Unread postby Alan Bergman » Thu Apr 15, 2010 8:24 pm

Hi Roberta,
I have read your post and also learned a few things as a result. This is good information
to know regardless of what vintage your conversion is.
Now I have to say: Your level of tenacity is just plain amazing to me. Of all the beautiful
ladies I know of (which you are one), (and some that aren't so beautiful), I don't know of a single gal who would even
consider attempting some of the technically complicated tasks that you seem to routinely take on.
I really admire you for sticking to it and your "geterdone" attitude.
I hope to see more of your articles. You also have a wonderful ability for composing technical drafts.
Keep it up!
Al
My "Cottage Car" is a 1985 Lesharo with a 3.8 Buick V6
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