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Old 12-29-2005, 08:44 PM   #1
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Angry possible aprks issues??

First off, thank you for all the awesome comments I received from you on my new custom turbo build. So here's what I'm getting from my tuner, unfortunatley he's 300 miles away and I can't get down there. The car is fine up to 10psi and then it's like no spark as he explains it over 10 psi, just can't do it. If he starts off at 2k and steps on it, it's fine up to 10 psi, if he steps on it at 4k doesn't do so good. He tells me it "feels" like a spark issue. I've read here how you guys are running 15+ psi on stock ignition. I've got the stock ignition with the Motorcraft colder copper plugs and FC plug wires. Plugs are gapped at .028. i know it should be capable of well over 10 psi, could it be plug wires? Pectel T2? Air/Fuel is great.

Help!!!!!!!!!!!!!

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Old 12-29-2005, 08:46 PM   #2
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Great spelling eh!

Spark Issues!!!

DUH

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Old 12-29-2005, 11:22 PM   #3
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Id look at your settings in the Pectel T2

Sell it and go to the SCT PRP and you will be way ahead of the game

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Old 12-30-2005, 12:07 AM   #4
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do you think the Pectel is the problem?? This is supposed to be a racing computer!

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Old 12-30-2005, 07:18 AM   #5
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I dont know that it is but i do know there a pain to use. Try getting up with P51 on FJ he has a pectel and has 95% of all the bugs worked out or around

There is far more support for the SCT PRP than the T2. The PRP also has more controle over the stock ECU. P51 is also up in your neck of the woods as well

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Old 12-30-2005, 10:21 AM   #6
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I just wanted to add to kieths topic, i am tuning his car and have had no trouble working with the pectel. Yes it is a little complicated the navigation and all the settings but it all makes sence once you get into it. The timing is conservative and i have steady stated it on the dyno as well. I cannot see anything in the program that would lead me to believe that the pectel is at fault. I am purly telling you what i feel on the road and how it compares to other cars i have tuned with the same problem. Now yes i would feel stupid if its not that but i have checked everything to the best of my ability and can only conclude it has something to do with the spark. I am not doubting the factory coils when so many other people have no problems with them. All i can think of is that i have a bad set of coils or even plug wires. The car only seems to react the way it does intermitently. I cannot duplicate it everytime below 10psi, above 10 it will not fire. I know this is frustrating for Kieth and well i want nothing more than to get it back to him. I am not sure what to do other than try some upgrade to the ignition or just a new coil set from factory.
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Old 12-30-2005, 11:02 AM   #7
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Maybe your getting into a fuel issue instead of spark? I recently had a sorta similar problem with mine, I had been doing work on it and unplugged the fuel rail pressure sensor. When driving up the road I would get around 10psi it would misfire, since the ECU couldn't read the sensor it was running "stock" instead of what the tune was telling it to.

Basically it was leaning out and getting detonation... which also feels/acts like spark blowout.

Whats your AFR at 10psi and you fuel pressure???
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Old 12-30-2005, 11:08 AM   #8
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i know the a/f is in the 11.7 range very solid and the fuel pressure is about 60 i think i havent looked at it only cause i am driving. I think it is around there though
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Old 12-30-2005, 11:09 AM   #9
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I also dont hear any knock at all.
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Old 12-30-2005, 11:51 AM   #10
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Well i am going to do a little test i have installed some 55 lb injectors just to see and rule out the fueling issue if there is one. Plus there is no problem with a little bigger injector anyhow. I will let you all know what i figure out on this..........
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