87 turbo supra runing bad.

kidthunder650 · 03-23-2007, 10:16 PM

ill start off with the car has been rebuilt new gaskets, bearings, turbo, ect. under boost it seamed to be sluggish. almost as if it was skipping. it was running really rough. if you give it throttle under a load it runs rough. cruise it runs ok.

today it blew a coolant hose going to the turbo, i fixed that. now it wounlt start. when i get it running, it blows black smoke. changed the plugs as they were all wet and fuel folled.

at tdc the timing mark is at like 4 or 5, i think the book says its supost to be 0. it has aem cam gears, which i wish i could take off but i only have 1 stock gear.

i have fuel and spark, the tp sensor connector was off for a while today, i thought that was why it loaded up with fuel but it didnit fix it. the car has alot of new parts. if anyone has any advice on where to start let me here it.

i have a few people coming over tomorow to take a look at it. if anyone in the RI area wants to come help me work on this car, let me know.

ill post up pics of the car tonight for everyone. thats all i can think of now.

IHateHacks · 03-24-2007, 01:39 AM

Ok, you said: "at tdc the timing mark is at like 4 or 5". You must be talking about the crank pulley, correct? Bottom line here is, the crank pulley is "keyed" onto the crankshaft nose, so if the crank pulley is installed (only one way to install the crank pulley because its keyed) TDC is at 0. What makes you think TDC is at "4 or 5"?

It really sounds like someone didn't install the timing belt or the cam gears correctly.

Try this, take off the upper timing belt cover, put the crank pulley at 0 and make sure the matchmarks on the cam gears line up with the notches on the inner timing cover. When the crank pulley is lined up with the 0 mark you could be at 1 of 2 TDC's. One of them is the compression stroke and the cam marks will line up with the notches on the inner cover. The other one is on the exhaust stroke and the matchmarks will be 180 degrees from the notches on the inner timing cover, so you might have to spin the crank twice to be on the correct TDC. The crank spins twice for every time the cams spin once, so the cams will revolve 1 time for every 2 revolutions of the crank.

So just make sure every 2 times you spin the crank to the 0 mark, the cams line up with the notches. I would really start there, I know it sounds confusing but once you know what I'm talking about, you'll see its pretty much common sense.

One last question, did this problem just arise out of nowhere or did someone "repair" something and now it runs like this?

03-23-2007, 10:16 PM	#1
kidthunder650 3" Exhaust Join Date: Mar 2007 Location: warwick ri Posts: 52	87 turbo supra runing bad. ill start off with the car has been rebuilt new gaskets, bearings, turbo, ect. under boost it seamed to be sluggish. almost as if it was skipping. it was running really rough. if you give it throttle under a load it runs rough. cruise it runs ok. today it blew a coolant hose going to the turbo, i fixed that. now it wounlt start. when i get it running, it blows black smoke. changed the plugs as they were all wet and fuel folled. at tdc the timing mark is at like 4 or 5, i think the book says its supost to be 0. it has aem cam gears, which i wish i could take off but i only have 1 stock gear. i have fuel and spark, the tp sensor connector was off for a while today, i thought that was why it loaded up with fuel but it didnit fix it. the car has alot of new parts. if anyone has any advice on where to start let me here it. i have a few people coming over tomorow to take a look at it. if anyone in the RI area wants to come help me work on this car, let me know. ill post up pics of the car tonight for everyone. thats all i can think of now.

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03-24-2007, 01:39 AM	#2
IHateHacks 20psi boost Join Date: May 2006 Location: New Haven/Hamden Posts: 793	Ok, you said: "at tdc the timing mark is at like 4 or 5". You must be talking about the crank pulley, correct? Bottom line here is, the crank pulley is "keyed" onto the crankshaft nose, so if the crank pulley is installed (only one way to install the crank pulley because its keyed) TDC is at 0. What makes you think TDC is at "4 or 5"? It really sounds like someone didn't install the timing belt or the cam gears correctly. Try this, take off the upper timing belt cover, put the crank pulley at 0 and make sure the matchmarks on the cam gears line up with the notches on the inner timing cover. When the crank pulley is lined up with the 0 mark you could be at 1 of 2 TDC's. One of them is the compression stroke and the cam marks will line up with the notches on the inner cover. The other one is on the exhaust stroke and the matchmarks will be 180 degrees from the notches on the inner timing cover, so you might have to spin the crank twice to be on the correct TDC. The crank spins twice for every time the cams spin once, so the cams will revolve 1 time for every 2 revolutions of the crank. So just make sure every 2 times you spin the crank to the 0 mark, the cams line up with the notches. I would really start there, I know it sounds confusing but once you know what I'm talking about, you'll see its pretty much common sense. One last question, did this problem just arise out of nowhere or did someone "repair" something and now it runs like this?