Engine problem

malli · 07-26-2006, 04:26 PM

I have here Supra year 1995-Engine 2jz-gte
Well I have a question about a engine problem-I did just put in a new cylinder block and it has only been driven 3000 km and now it's fucked up again.
The problem is that the pistons melt and the sparkplugs do also.
The turbos are set to too 1,2 bars and the fuel pressure is normal and its run on 95 okt.gas,Timing is also ok.
Too me it look's like overboost but what do you boy?s and girls think about this and is there somebody that has had the same problem????

Thanks Malli

SupraSaver87 · 07-26-2006, 10:28 PM

Your problem REALLY sounds like you are detonating. Your either running too lean, or you are pushing WAY too much boost. There could be another problem that is happening, but that would more than likely encompass something with your cooling system. I would check to see if you are getting proper cooling.

I would almost put money on detonation though. Gotta watch those aluminum heads. I am sorry to hear about your problem though, sounds like its a costly fix.

suprra_girl · 07-26-2006, 11:35 PM

absolutely detonation

get your fuel pressure checked when wot
make sure you injectors are not clogged

and have you ever been on a dyno? never should you turn boost up without some sort of monitoring device for your fuel system
best bang for the buck = zeitronix zt2 air fuel wideband meter www.zeitronix.com

Toyotafanatic · 08-01-2006, 12:44 AM

Yea detonation, really freakin lean or overboosting like hell, not sure how to get it tested listen to the other guys with MKIV's.

07-26-2006, 04:26 PM	#1
malli Stock Join Date: Jul 2006 Location: ICELAND Posts: 1	Engine problem I have here Supra year 1995-Engine 2jz-gte Well I have a question about a engine problem-I did just put in a new cylinder block and it has only been driven 3000 km and now it's fucked up again. The problem is that the pistons melt and the sparkplugs do also. The turbos are set to too 1,2 bars and the fuel pressure is normal and its run on 95 okt.gas,Timing is also ok. Too me it look's like overboost but what do you boy?s and girls think about this and is there somebody that has had the same problem???? Thanks Malli

07-26-2006, 10:28 PM	#2
SupraSaver87 3" Exhaust Join Date: Jun 2006 Location: Manitoba Posts: 150	Your Detonating Your problem REALLY sounds like you are detonating. Your either running too lean, or you are pushing WAY too much boost. There could be another problem that is happening, but that would more than likely encompass something with your cooling system. I would check to see if you are getting proper cooling. I would almost put money on detonation though. Gotta watch those aluminum heads. I am sorry to hear about your problem though, sounds like its a costly fix. __________________ My Ride: http://www.cardomain.com/ride/2351563 Our Supra’s, which art in the driveway, Hollowed be thy power, thy mods are great, thy speed endless, On the road or at the track. Give us this day free of cops, And forgive us our impound charges, as we forgive those who are slow. And lead us not into speed traps, and deliver us from the interceptors, For thine is our car, the power, and the glory…forever and ever….amen.

07-26-2006, 11:35 PM	#3
suprra_girl 7M POWAH! ;) Join Date: Jun 2004 Location: New Zealand Posts: 2,312	absolutely detonation get your fuel pressure checked when wot make sure you injectors are not clogged and have you ever been on a dyno? never should you turn boost up without some sort of monitoring device for your fuel system best bang for the buck = zeitronix zt2 air fuel wideband meter www.zeitronix.com __________________ Please use the forum to ask your questions as they will get replied to much faster than pming me Pics of my build. "Good girls are just bad girls that don't get caught" Do a diagnostic first!

08-01-2006, 12:44 AM	#4
Toyotafanatic 3" Exhaust Join Date: Jul 2006 Location: Victorville, CA Posts: 65	Yea detonation, really freakin lean or overboosting like hell, not sure how to get it tested listen to the other guys with MKIV's. __________________ BOOST IT!

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