Turbo B16 misfires when warm
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Turbo B16 misfires when warm
My friend just rebuilt his motor and through on a turbo kit. He had the identical setup on his other car that he totaled so he is using his old ECU to break it in and check for other issues before he takes it to the tuner. The car will start up fine, Idles steady above 10000, run finee up and down the street (havent gone past 4500).
We took it around the corner maybe 2 miles from his house and as soon as we turned back, it started popping and missing randomly. idle drops down to 5-600 but stays steady there.
Plugs are ngk 7 gapped at .030
He is going to use borrow a dizzy to see if its not the coil or something else ignition related.
And hes going to swap the fuel filter since the car sat for almost a year.
NO CEL
Any other suggestions?
EDIT: Problem solved. New distributor seemed to solve it
We took it around the corner maybe 2 miles from his house and as soon as we turned back, it started popping and missing randomly. idle drops down to 5-600 but stays steady there.
Plugs are ngk 7 gapped at .030
He is going to use borrow a dizzy to see if its not the coil or something else ignition related.
And hes going to swap the fuel filter since the car sat for almost a year.
NO CEL
Any other suggestions?
EDIT: Problem solved. New distributor seemed to solve it
Last edited by ay_billy; 08-15-2012 at 08:40 AM.
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Re: Turbo B16 misfires when warm
Are you saying every time the engine is first started it runs fine until it reaches operating temps? Do you have a wideband installed? what is the afr's when all this is going on?
I agree if your not going into boost 20ths gap isn't going to help at all. If the kit was on a higher compression engine and now the compression is lower like so many boosted cars end up. a 40ths gap might be better during break in.
I agree if your not going into boost 20ths gap isn't going to help at all. If the kit was on a higher compression engine and now the compression is lower like so many boosted cars end up. a 40ths gap might be better during break in.
Last edited by fcluddington; 07-29-2012 at 05:27 AM. Reason: more stuff written
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Re: Turbo B16 misfires when warm
My friend just rebuilt his motor and through on a turbo kit. He had the identical setup on his other car that he totaled so he is using his old ECU to break it in and check for other issues before he takes it to the tuner. The car will start up fine, Idles steady above 10000, run finee up and down the street (havent gone past 4500).
We took it around the corner maybe 2 miles from his house and as soon as we turned back, it started popping and missing randomly. idle drops down to 5-600 but stays steady there.
Plugs are ngk 7 gapped at .030
He is going to use borrow a dizzy to see if its not the coil or something else ignition related.
And hes going to swap the fuel filter since the car sat for almost a year.
NO CEL
Any other suggestions?
We took it around the corner maybe 2 miles from his house and as soon as we turned back, it started popping and missing randomly. idle drops down to 5-600 but stays steady there.
Plugs are ngk 7 gapped at .030
He is going to use borrow a dizzy to see if its not the coil or something else ignition related.
And hes going to swap the fuel filter since the car sat for almost a year.
NO CEL
Any other suggestions?
CELs won't matter too much because most of them will be disabled. Your friend's practical last resort is a re-tune or at the least hook ecu up to a laptop, enable all CELs, and log to see what's actually going on.
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Re: Turbo B16 misfires when warm
Just because it's identical doesn't mean it's the same. You gotta remember once you open up a motor everything changes, even just removing the distributor will change everything. Just a few things to check for are timing, afr's, and map sensor (I had a map sensor problem before that gave me the same problems as your friend and usually happened when revving to 4k rpm). Another thing is like you said trying another distributor. Also, what program is he using? If he is using Crome, or the like, chips go bad from time to time and especially if you end up having some sort of electrical short or if the ecu is exposed to the sun because heat will also affect the chip.
CELs won't matter too much because most of them will be disabled. Your friend's practical last resort is a re-tune or at the least hook ecu up to a laptop, enable all CELs, and log to see what's actually going on.
CELs won't matter too much because most of them will be disabled. Your friend's practical last resort is a re-tune or at the least hook ecu up to a laptop, enable all CELs, and log to see what's actually going on.
The only CEL disabled would be the O2. Everything else would be the same.
And he wants to get it retuned, but we the tuner told us to make sure its running right or he would charge the hourly rate to fix. Id rather try first with the means we have.
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Re: Turbo B16 misfires when warm
If the chip was bad, wouldnt the problem start as soon as the car is turned on?
The only CEL disabled would be the O2. Everything else would be the same.
And he wants to get it retuned, but we the tuner told us to make sure its running right or he would charge the hourly rate to fix. Id rather try first with the means we have.
The only CEL disabled would be the O2. Everything else would be the same.
And he wants to get it retuned, but we the tuner told us to make sure its running right or he would charge the hourly rate to fix. Id rather try first with the means we have.
CELs, depends on the tuner's preference on what is and is not disabled.
Best bet is to log the car, but at the least check everything I mentioned. Also make sure injectors are ok too, I forgot to mention this earlier. It sucks that your tuner wants to charge you fees, I go to Church's and they now charge $190/hr but cap it at $380 max including troubleshooting (if needed) and being on dyno for more than 2hrs. There were a few times that we were on the dyno for more than 4hrs and were only charged the cap. Then again, this is maybe due to me being a customer for about 5 yrs.
Anyway, good luck and keep us posted.
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Re: Turbo B16 misfires when warm
I do not know what solved the problem but heres a few thing we did
5 gallons of 91 with injector cleaner. It reads under half now.
The sensor under the dizzy, the ect sensor, that single bullet style connector was loose. Squished down the connection a little. Still kind of loose though.
Replace the dizzy with a new ebay unit.
Coil measured at 2-3 ohms, but even the new one did??
Either way PROBLEM SOLVED
5 gallons of 91 with injector cleaner. It reads under half now.
The sensor under the dizzy, the ect sensor, that single bullet style connector was loose. Squished down the connection a little. Still kind of loose though.
Replace the dizzy with a new ebay unit.
Coil measured at 2-3 ohms, but even the new one did??
Either way PROBLEM SOLVED
Last edited by ay_billy; 08-15-2012 at 08:39 AM.
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