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 Post subject: Computer Programming
 Post Posted: Thu Oct 02, 2008 8:48 pm 
When i went in to get hired for the new job, there was a guy there with a 83 CJ, 4.2L. He installed the mopar fuel injection kit and is having a problem with it stuttering in certain gears under certain loads. Hes been working with the guy who owns the shop trying to figure it out. Hes comming to the conclusion that the computer may need programmed. The motor has been bored out .40 over and has some other work done too i believe. Because the kit is based off a 4.0 and has 4.0 injectors, he is thinking that the oversize motor may be needing more fuel than the computer and injectors are providing.

So, anyone know a good place to get an engine controller programmed?


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 Post subject: Re: Computer Programming
 Post Posted: Fri Oct 03, 2008 10:15 pm 
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Did ya get the job?

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 Post subject: Re: Computer Programming
 Post Posted: Sat Oct 04, 2008 12:51 am 
The PIG Smith wrote:
Did ya get the job?

oh yea, i got that on the spot :tu2:


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 Post subject: Re: Computer Programming
 Post Posted: Sat Oct 04, 2008 8:08 am 
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mr. snuffleupagus
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the only ones i know of, are out of state, and are for doing hemi convertions....what about trying a ajustable fuel pressure regulator?

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 Post subject: Re: Computer Programming
 Post Posted: Sat Oct 04, 2008 8:11 am 
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mr. snuffleupagus
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or maybe a more CFM fuel pump...

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 Post subject: Re: Computer Programming
 Post Posted: Mon Oct 06, 2008 5:59 pm 
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spackled
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Adjustable regulator and/or larger injectors. Any thing that was done in the rebuild of the motor to make more power will also increase the demand for fuel. Don't know if the Mopar Tech line will be any help or you could also try contacting Hurley Engine Service Co. (HESCO) They do alot of 4.0 strokers and kits.

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 Post subject: Re: Computer Programming
 Post Posted: Mon Oct 06, 2008 8:33 pm 
Talked to Travis today, i guess hes already done larger injectors and fuel pump


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 Post subject: Re: Computer Programming
 Post Posted: Mon Oct 06, 2008 11:39 pm 
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mr. snuffleupagus
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nobarrierz wrote:
Talked to Travis today, i guess hes already done larger injectors and fuel pump
but if he hasnt dont the regulator it wont let the optimal amout of fuel in though, it will still send it at stock cfm. see if he did the regulator too, because most of the time in a stroker you dont need to program the ECU just need to make it thing s still stock

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 Post subject: Re: Computer Programming
 Post Posted: Tue Oct 07, 2008 7:18 am 
i dont think he stroked it, he bored it .30 over once then .40 during a second rebuild. The injectors and pump came as a kit, so id imagine a regulator would have been with it, but ill find out. Travis is a pretty smart guy, so im sure hes been over all this in his head already, and he knows way more about whats been done already than me. The things hes been thinkin are computer or something with the map sensor. The Jeep was originally in California, and had the f.i. installed while still there. Hes wondering if the tune is different for the mountainous terrain out there, and the obvious Cali emissions


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 Post subject: Re: Computer Programming
 Post Posted: Wed Oct 08, 2008 3:51 pm 
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probably something with goofy ass cali emissions.
Besides the MAP sensor, also check the O2 sensor, and the engine temp sensor

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 Post subject: Re: Computer Programming
 Post Posted: Wed Oct 08, 2008 7:36 pm 
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Hmm.. have you checked the relay?

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 Post subject: Re: Computer Programming
 Post Posted: Wed Oct 08, 2008 8:05 pm 
Alpine wrote:
Hmm.. have you checked the relay?


lol, that took a while to show up!


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 Post subject: Re: Computer Programming
 Post Posted: Wed Oct 08, 2008 8:10 pm 
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Pervert Row
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If you think it needs more fuel then read the plugs...

My 4.6 stroker took a a few miles to sort the comp. out, but its all stock save for the crank, rods, and some head work...So I really don't see how it can be the comp...

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 Post subject: Re: Computer Programming
 Post Posted: Wed Oct 08, 2008 9:00 pm 
well its not a constant problem, just under certain loads it cuts out like a fuel issue. Jeep hasnt been in for a while to have it looked at though, its like an ongoing issue that gets checked once in a while, but hes living with it since its intermittant


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 Post subject: Re: Computer Programming
 Post Posted: Wed Oct 08, 2008 9:06 pm 
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Could it also possibly be ignition?

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Jeeper4Life wrote:
noone means any harm and that it's all in fun.. but then there's kennedy..

'46CJ2a/buggy project in the works, yeah, still have those parts.
'14 Chebby Silverado, 4x4
'88 GMC S15 Trail Gypsy
A sweet lawn mower
Motorcycles: '14 HD FLHTCU, '92 HD FXRS, '26 HD JD, '02 Suzuki DRZ400, '56 Cushman Eagle, '48 Simplex ServiCycle, '72 Honda MiniTrail50, '81 Yamaha YR250, Probably some other stuff
"Tell me and I'll forget. Show me and I'll remember. Involve me and I'll understand." - Confucius
Image.................................................... ImageImage
"Concern yourself with what is right and you'll never second-guess that decision"
I'm not really an asshole, I just play one on the internet!


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 Post subject: Re: Computer Programming
 Post Posted: Wed Oct 08, 2008 9:42 pm 
kennedy wrote:
Could it also possibly be ignition?

Could be anything. But like i said, Travis is a really smart tech, and i havent been there for the whole case, so i dont really know all the details of whats been looked at and done. I just know that he was starting to be suspicious of the computer and the fuel, and he was asking around about places to get the comp programmed, so thats why i asked on here


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 Post subject: Re: Computer Programming
 Post Posted: Wed Oct 08, 2008 9:54 pm 
:? you get bad gasoline?


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 Post subject: Re: Computer Programming
 Post Posted: Sat Oct 11, 2008 8:48 am 
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mister wiskers
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Take it to Exotic Performance Plus (EPP) in Columbia city. Have them dyno tune it. They can remap the computer while on the dyno, but it ain't cheap.

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 Post subject: Re: Computer Programming
 Post Posted: Sun Oct 12, 2008 10:21 pm 
Tuffjarhed wrote:
Take it to Exotic Performance Plus (EPP) in Columbia city. Have them dyno tune it. They can remap the computer while on the dyno, but it ain't cheap.


Ya, i imagine its not. But ill toss the idea to him


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 Post subject: Re: Computer Programming
 Post Posted: Wed Nov 05, 2008 11:42 pm 
well, apparently i fixed it. Travis called Hesco, a mopar mpi kit distributor, and talked to them about the issue. They said to first take the dist. and turn it both directions until it starts to die, then set it to the middle of those two points. They also said to check the air gap for the CKP sensor, it should be .040". So i did the distributor, and it ended up in the same spot. Next was the CKP sensor. It was significantly less gap than it should be. Couldnt get .040 feeler gauge in unless i pushed on it pretty hard. So i adjusted that. He came back today (i did this all yesterday) and said it runs great now. No more stumbling and accelerates great. So, apparently it wasnt a computer issue...no ones perfect. Just simply a mis-adjusted air gap. But those of you with fuel injection know how much of a pain in the ass those mopar CKP sensors are! Nothin but troubles


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 Post subject: Re: Computer Programming
 Post Posted: Wed Nov 05, 2008 11:47 pm 
nobarrierz wrote:
well, apparently i fixed it. Travis called Hesco, a mopar mpi kit distributor, and talked to them about the issue. They said to first take the dist. and turn it both directions until it starts to die, then set it to the middle of those two points. They also said to check the air gap for the CKP sensor, it should be .040". So i did the distributor, and it ended up in the same spot. Next was the CKP sensor. It was significantly less gap than it should be. Couldnt get .040 feeler gauge in unless i pushed on it pretty hard. So i adjusted that. He came back today (i did this all yesterday) and said it runs great meow. No more stumbling and accelerates great. So, apparently it wasnt a computer issue...no ones perfect. Just simply a mis-adjusted air gap. But those of you with fuel injection know how much of a pain in the ass those mopar CKP sensors are! Nothin but troubles

Boogers and shit!!...mopar


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 Post subject: the air gap for the CKP sensor
 Post Posted: Fri Nov 07, 2008 12:52 pm 
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spackled
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... and CKP is tech speak for what?

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 Post subject: Re: Computer Programming
 Post Posted: Sat Nov 08, 2008 10:14 am 
Crank Position Sensor. In case ya ever hear it, CMP is Camshaft Position Sensor. Sorry


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