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Old 10-19-2005, 12:06 AM   #1 (permalink)
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TPI wiring harness

I am getting ready to put a 91 Vette TPI motor with a TH700R4 into my CJ. I have been shopping wiring harnesses. I am not interested in making or modifying my own. I am most interested in a complete harnness that is easy to install. I have looked at Painless, Speed Scene, and Howell. I am sure there are others as well. What do you guys like and why? Thanks.
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Old 10-19-2005, 04:45 AM   #2 (permalink)
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I'd use a Painless. They have great tech support, but you will pay a little more. When you get ready for a prom drop me a note, or look at 55CJ5's auction on E-Bay.
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Old 10-19-2005, 05:43 AM   #3 (permalink)
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Originally Posted by MrWillys
I'd use a Painless. They have great tech support, but you will pay a little more. When you get ready for a prom drop me a note, or look at 55CJ5's auction on E-Bay.

X2 i love mine:
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Old 10-19-2005, 05:50 AM   #4 (permalink)
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This month, 4 Wheel Drive and Sport Utility magazine swapped a 93 LT1 into a Scrambler. They mentioned these guys for a harness:
http://www.turbocity.com/default.php?cPath=16_23
$450 for a complete TPI harness. They said the harness was simple to work with, all GM plugs and tags on each one. Just a thought.
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Old 10-19-2005, 07:19 PM   #5 (permalink)
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I used a factory harness when I installed TPI in my Blazer, now I have that engine in my Jeep and I used a Painless harness this time. Money well spent, quality harness
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Old 10-20-2005, 02:44 PM   #6 (permalink)
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I used Jim's Performance for my harness. Good harness and he can add or remove whatever you want as well as offer quick tech assistance. Not bad for $295. I think TPI Jeep used him as well.

http://www.jimsperformance.com/

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Old 10-20-2005, 03:07 PM   #7 (permalink)
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I supported our vendors at

http://www.affordable-fuel-injection.com/index.htm

and really like the product, price and service (shameless plug). And I got a new prom with my kit
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Old 10-21-2005, 07:33 AM   #8 (permalink)
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Quote:
Originally Posted by Insayn
I used Jim's Performance for my harness. Good harness and he can add or remove whatever you want as well as offer quick tech assistance. Not bad for $295. I think TPI Jeep used him as well.

http://www.jimsperformance.com/


I have jims also and have installed his harnesses in several others also he is very nice and knows what he doing and will also answer any question you have

Last edited by fireman; 10-21-2005 at 07:34 AM.
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Old 10-21-2005, 12:12 PM   #9 (permalink)
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I have jims also and have installed his harnesses in several others also he is very nice and knows what he doing and will also answer any question you have
Jim from Jim's Performance is a great guy, but he failed to take the time too ask what injector number I was using and couldn't burn my chip to work right after two tries at it. I guess I should thank him, and others for forcing into burning my own proms.
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Old 10-21-2005, 12:55 PM   #10 (permalink)
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Jim from Jim's Performance is a great guy, but he failed to take the time too ask what injector number I was using and couldn't burn my chip to work right after two tries at it. I guess I should thank him, and others for forcing into burning my own proms.


I have personally never had a problem he even asked for the specs on the cam if I had them.
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Old 10-21-2005, 04:35 PM   #11 (permalink)
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I have personally never had a problem he even asked for the specs on the cam if I had them.
Did he ask if you had an adjustable fuel pressure regulator? If not what is the fuel rail number? What is the injector number? Asking about the Cam specs is also needed.
I tried Formato's, TPiS, Jim's Performance, and even Leonard from from Chevythunder.com . What I later realized was that my 85 Vette injectors are really 23 lbs @ 43.5 psi. Not the standard TPI of 21 lbs. 85 was the only year that they did this.
I'm not blaming the guy, because he's in good company. They just don't have time to care and you better do as much research as you can. I spent a $1000.00 on prom's before I started burning my own.
I really think a guy can learn more from reading on a board like this.
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Old 10-21-2005, 05:35 PM   #12 (permalink)
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Quote:
Originally Posted by MrWillys
Did he ask if you had an adjustable fuel pressure regulator? If not what is the fuel rail number? What is the injector number? Asking about the Cam specs is also needed.
I tried Formato's, TPiS, Jim's Performance, and even Leonard from from Chevythunder.com . What I later realized was that my 85 Vette injectors are really 23 lbs @ 43.5 psi. Not the standard TPI of 21 lbs. 85 was the only year that they did this.
I'm not blaming the guy, because he's in good company. They just don't have time to care and you better do as much research as you can. I spent a $1000.00 on prom's before I started burning my own.
I really think a guy can learn more from reading on a board like this.

I understand what you are saying but every harness and prom I have ordered from him he usually asks if not I will tell him. I agree I do not post alot but I have learned a ton off this board.
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Old 10-22-2005, 03:49 AM   #13 (permalink)
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I had a really bad experience with my Howell Performance harness and (PCM) computer kit ...
Their junk yard scavenged computer was bad from the get-go and the alt. exciter circuit still doesn't work.
Finally, six months later and after paying to have it scanned by two shops and handfull of new $$GM$$ sensors ... TPS, CPS, MAP ... the certified GM tech instructor in the auto department at our local College discovered the problem and pronounced the box dead. All the 5v. feeds were corrupt leading to multipal random sensor malfunctions. And on close visual, a nasty green corrosion had started seeping from the box's insides into one of the of the external pin sets and on into it's new harness plug! He said the system had never left 'safe' mode ... no wonder my new rig acted like such a dog! At least this safeguard part pf the OEM program kept my brand new engine from getting hurt by all this.
Then to top it off, after asking for a replacment of their computer with it's custom $250 program ... the harness was invoiced seperately at $500 ... Howell finally just blew me off with a $165 refund leaving me to fend for myself to find a computer with it's OEM program that actully worked.
And all that after I spent over $400 in diagnostics and hardware just trying to find out what was the matter with their damn junk!
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Old 10-23-2005, 03:29 PM   #14 (permalink)
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Has anybody used Speed Scene? I have talked to a bunch of different companies and was impressed by Speed Scene. It does bother me that nobody else has heard of them.

www.speedscenewiring.com
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Old 10-24-2005, 04:39 PM   #15 (permalink)
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I have a Painless on my 89 TPI. Been running it for years, no problems. The only change I might make is removing the MAF from the equation, considering I've gone through I don't know how many. Thank JEBUS for MAFs on ebay.
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