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Urgent help went BPU tonight, problem


jamesmark

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James, did you disconnect the FCD and join the TPS signal wire up back to normal as i stated in post no 3? Yes you will hit Fuel cut alot sooner as you reverting back to stock.

 

This should take you 10 mins tops to check.

 

My money is still on the FCD.

 

Not done this yet mate, but thats on the list.

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Ok I have disconnected the fcd and reconnected it to stock setting and let the car idle for 5+ mins, no worning lights. I let the car idle for less than that earlier on when i went back out to check it previous post, so will drive it tomorrow so will reserve judgement till then.

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If it's a T piece in the MAP sensor line then that definietly needs sorting straight away. Don't T anything off the MAP sensor of fuel pressure reg lines.....

 

The T-piece iirc is connected to the FPR pressure ref hose in this pic, I am sure its connected to this but knowing in me I am wrong.

 

http://www.mkivsupra.net/vbb/attachment.php?attachmentid=13939&d=1112558977

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James, did you disconnect the FCD and join the TPS signal wire up back to normal as i stated in post no 3? Yes you will hit Fuel cut alot sooner as you reverting back to stock.

 

This should take you 10 mins tops to check.

 

My money is still on the FCD.

 

FCD's have nothing to do with TPS (Throttle Position Sensor). The FCD cuts the MAP sensor wire. :)

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If it's a T piece in the MAP sensor line then that definietly needs sorting straight away. Don't T anything off the MAP sensor of fuel pressure reg lines.....

 

a bit off topic but chris, where is the best location to t a pipe for a boostgauge then? i was told the tube coming out of the MAP sensor was the best?

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a bit off topic but chris, where is the best location to t a pipe for a boostgauge then? i was told the tube coming out of the MAP sensor was the best?

 

 

What Chris meant was, if you take a T from there you risk causing a split in the vac pipe or the T itself overtime, so if there was a leakage from any one of the vac pipes leading to the Map sensor During boost you risk running lean and thus killing your Engine. The tell tale signs during idling would be very lumpy idling and black smoke billowing out form the tail pipe.

 

TBH if you do it properly it'll be fine, It's worth replacing the old hoses with new silicone vac ones and securing them on firmly especially around the Map sensor.

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What both Chris and Adnan have said are absolutely correct. Never Tee off an the fpr line! Slow dog (TWAT) did this to mine and I very nearly killed my engine after the boost pressure sensor popped off during a track day.

 

TBH if you do it properly it'll be fine, It's worth replacing the old hoses with new silicone vac ones and securing them on firmly especially around the Map sensor.

 

I can't agree with the comments regarding silicon lines, a good quality rubber/Teflon hose is far tougher and less prone to heat problems than silicon.

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I can't agree with the comments regarding silicon lines, a good quality rubber/Teflon hose is far tougher and less prone to heat problems than silicon.

 

Darryl, compared to stock 'cooked' ones there a hell of alot better. But yeah if you can get the above, as you have said, they are better.

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