charge Temps keep going high over 140 and car runs like crap then

SVTdreamin04

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Yes I think the problem is probably fuel but I will probably have to wait till fall do get into a shop. they are all two months out around here and I can still drive it just cant get on it with the ways its running.
And what should my plugs be gaped at?
I do have a wideband guage but I always forget to look at it when it hesitates

Gap them as wide as possible without plug blowout. I had blowout at anything over .030. I gapped them at .028.

You need to pay attention to that wideband. That might tell you what you need to know.


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MG0h3

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Lot of us go down to 26.

You need to watch your wideband and verify your meth is working.

You could be detonating the shit out of it.

If you don’t drop down to @11.5 within a second or two of WOT get out of it.

And verify meth operation first. I missed the 21psi on pump gas but without meth you’re cooking


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SVTdreamin04

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Lot of us go down to 26.

You need to watch your wideband and verify your meth is working.

You could be detonating the shit out of it.

If you don’t drop down to @11.5 within a second or two of WOT get out of it.

And verify meth operation first. I missed the 21psi on pump gas but without meth you’re cooking


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Solid advice here, O.P. Verify wideband and meth is working.


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Banshee06

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I looked back and my plugs I gapped to .032.
how can you tell if you are getting blowout?
I will start watching my wide band when i got WOT.
The car usually balks right away when I go WOT. I can accelerate but I have to do it gradually.
 

c6zhombre

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Even with the meth functioning 100%....that's at least 3psi and MULTIPLE degrees of timing too much. You don't see a 8.5/1 comp 4.6 make over 700 without 20+ psi and 20+ degrees timing. 91 (I'm guessing that's what Oregon has) PLUS meth is not the equivalent of solid E85 and never will be. For a tuner to set that car up like that, let the customer drive off......that's just flat out wrong.

You need to pulley down to 18psi and get a retune. 625 tops. That motor is cruise'n for a serious bruise'n.
 

MG0h3

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I looked back and my plugs I gapped to .032.
how can you tell if you are getting blowout?
I will start watching my wide band when i got WOT.
The car usually balks right away when I go WOT. I can accelerate but I have to do it gradually.

I suspect the dyno guys know what fueling most cars need. If they car is stumbling and breaking up, I’d guess you’d see a rich condition with it. If it were on a scope you could see it but never seen that at a dyno place.

And 32 is too wide for 20psi.

If you try the WOT just do like 2000 to 2500. Not sure if you can log or not cause that’s a quick blast but that’s how my tuner had me doing it on initial E tune.

Start by verifying meth and I’d drop the plugs down.


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Banshee06

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How do you verify meth?
I have a green light that comes on when the meth is sprayed and the more boost the more meth and the brighter the light gets.
I will have to regap the pugs but my JLT CAI is a pain to take off.
 

SVTdreamin04

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How do you verify meth?
I have a green light that comes on when the meth is sprayed and the more boost the more meth and the brighter the light gets.
I will have to regap the pugs but my JLT CAI is a pain to take off.

Car goes lean if not getting the correct amount of meth the car was tuned to. I agree with others on here, you're making too much boost on pump gas. You need to watch that wideband like a hawk.


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IllCobra

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Maybe I missed it but shouldn't we know what spark plug he's using before suggesting gap? Wouldn't .030 gap be ok if OP is running TR7ix?
 

c6zhombre

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Maybe I missed it but shouldn't we know what spark plug he's using before suggesting gap? Wouldn't .030 gap be ok if OP is running TR7ix?

It's not recommended to run iridiums at these kinds of boost levels. TR6 or BR7EF (the most shrouded of all) are most recommended. I'm sure there's other copper brands, but most use the NGK.
 

SVTdreamin04

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It's not recommended to run iridiums at these kinds of boost levels. TR6 or BR7EF (the most shrouded of all) are most recommended. I'm sure there's other copper brands, but most use the NGK.

TR6 is all I'll run.


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c6zhombre

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TR6 is all I'll run.


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I ran the BR7EF until 2013 when Kevin suggested I swap to the TR6. With both gapped .028, the TR6 just ran better. On pump gas, they idled noticeably smoother. On E85, I didn't really notice much difference in idle (ethanol idles awesome regardless of plug) but the car just felt slightly stronger with throttle inputs.

Regarding the gap, I've never had "spark disruption" at .028......it's always screamed to redline. But some will and tightening down to .026 or even lower might be necessary and recommended by the tuner.
 

Banshee06

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One more question for you Cobra owners about my overheating problem.
I have a aftermarket Canton radiator tank with a radiator cap that screws on.
I dont think it is vented if I use the stock one then the radiator overflows all over the tank.
So the one I have screws on tight and doesnt leak.
I have told this to all the shops I have taken it to and they have never said anything about that.
 

BLOWN9646

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The coolant system is pressurized, no vented cap. The stock cap doesn't seal your Canton overflow tank
 

Banshee06

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The coolant system is pressurized, no vented cap. The stock cap doesn't seal your Canton overflow tank
Thats good too know I thought maybe the engine was putting extra pressure into the cooling system and making the car run hot too.
 

BLOWN9646

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Thats good too know I thought maybe the engine was putting extra pressure into the cooling system and making the car run hot too.

I was just saying it's not holding pressure, not sure if the cap fits correctly or not. Maybe try a new stock cap
 

Banshee06

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Update!
Got the new Fuel Injectors in and went for a drive car still will falter and pop when accelerating.
Tech then sprayed starter fluid around the intake on passenger side where he said the two injectors were not working right. and the car imediately idled faster.
So now they say my intake gasket has a leak. and I need to pull off My KB 2.8 liquid cooled supercharger and replace the gasket. Because this making the car run lean and not accelerate and could be whey my engine gets so hot.
Does anyone if this sounds like the problem of my engine balking on acceleration and the engine getting ho?
 

olympic

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It will definitely cause driveability issues. Fix it and see if any problems remain.
 

hotcobra03

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Being car does run.

For testing. I would do things to engine sensors 1 by 1.

Pcm should respond and give code for what you did.

I did this when learning on mine
Pcm is extremely smart
 

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