irattic boost pressure????????
confuzed member
Joined: Jul 2003
Posts: 3,074
From: Salinas, CA
You're hitting safety boost. Safety boost will not let your car boost past 7 psi. At 14 psi...I hope you have an aftermarket ecu. The reason that you may be going in and out of safety boost may be that you're detonating. It sounds like pebbles in a coffee can. If that is so, You need to lower the boost immediately as you could do some serious damage to your motor. Here's a whole tech on why you could be going into safety boost:
http://twinturbo.net/ttnetfaq/FAQpages/safetyboost.html
Also do an ECU diagnostics and see if you get any codes to come up. Good luck.
http://twinturbo.net/ttnetfaq/FAQpages/safetyboost.html
Also do an ECU diagnostics and see if you get any codes to come up. Good luck.
confuzed member
Joined: Jul 2003
Posts: 3,074
From: Salinas, CA
It means the detonation sensor. If you look at the throttle cabble cover and go directly back about 2 inches or so, that's the connector to the detontaion sensor. The actual detonation sensor is quite a way bit down there...It takes A LOT of work to get to that.
confuzed member
Joined: Jul 2003
Posts: 3,074
From: Salinas, CA
You'll want to put that in as soon as possible. I doubt it's causing you're boost problem right now, but you'll have other problems if you don't get that done. Have you investigated that saety boost problem yet? Does the detonation description match what you're exeriencing? Does it go away after you shut off the car or take it easy for a little?
Guest
Posts: n/a
i think i found the problem. from the pic on the link i went and checked the connector. there is a black wire and a white wire coming out of the bottom of the connector. the white one's insulation had been melted and it was grounding itself out. im going to re insulate it and move it away from the block better. hopefull that will take care of it. i will let ya know in a few minutes.
Registered User
Joined: Nov 2003
Posts: 3,672
From: Gerber, CA
I have to disagree with you EMO 
, but relocating the knock does not work properly. The knock sensor is basically just a microphone. The further you put away from what it's listening for, the less effective it will be. Plus, it picks up other sounds when you do this and may mistake it for pinging. If it is the knock sensor, just bite the bullet and fix it right.
, but relocating the knock does not work properly. The knock sensor is basically just a microphone. The further you put away from what it's listening for, the less effective it will be. Plus, it picks up other sounds when you do this and may mistake it for pinging. If it is the knock sensor, just bite the bullet and fix it right.
Guest
Posts: n/a
well, ive got good news and bad news
bad news first- ive got a broken neck
good news- it was the wire
(just kidding on the broken neck thing)
i have never even ridden in a car with this much power. it is absolutly unbelievable.
thanks everyone.
bad news first- ive got a broken neck
good news- it was the wire
(just kidding on the broken neck thing)
i have never even ridden in a car with this much power. it is absolutly unbelievable.
thanks everyone.
confuzed member
Joined: Jul 2003
Posts: 3,074
From: Salinas, CA
Good I'm glad that it's fixed. And yes, forced induction is a beautiful thing. As far as relocating the knock sensor goes, it's arguable. Some say that it does what you say it will, other's say that it gives you some knock sensor protection...just not as much as the stock location, but it's worth it since you avoid a plenum pull. It's all a matter of opinion.
Registered User
Joined: Oct 2003
Posts: 1,494
From: Palmyra,Va
Emo stop beating a dead horse already 
(91zxtt)....knock sensors are a bitch to get to, so once you are there i'd replace it anyway, no matter if it's good. i'll put that on my list of to do things once i do the swap...thanx guys you are the best
(91zxtt)....knock sensors are a bitch to get to, so once you are there i'd replace it anyway, no matter if it's good. i'll put that on my list of to do things once i do the swap...thanx guys you are the best
Guest
Posts: n/a
last night i ran it for about an hour on and off and it never re-entered safety mode.
today it boosted perfect this morning but then it started going back into safety mode.
i took it to my mechanics to check the codes and it came back as a bad knock sensor. i re insulated what i did last night thinking it might have come loose and grounded out again. he cleared the codes and as soon as i got back on the road it still would not boost above 7. i think the sensor is bad from grounding itself out for so long, what do all of you think?
today it boosted perfect this morning but then it started going back into safety mode.
i took it to my mechanics to check the codes and it came back as a bad knock sensor. i re insulated what i did last night thinking it might have come loose and grounded out again. he cleared the codes and as soon as i got back on the road it still would not boost above 7. i think the sensor is bad from grounding itself out for so long, what do all of you think?
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