Loud clunking and idle problem

[x-kiwi-x]

Ok guys. Rebuilt my 7bolt about 500miles ago, then blew the head gasket (dont ask me how) but after having the head at the machine shop for a full rebuild, a new gasket and hydrolic timming tensioner later all looked good. Also put a 1g TB on it, and ported the intake, used my same tps and iac from the 2g TB.

After tuning in the tps i started it up and it has been running really ruff, idling high then dying. I played around with the tps and biss screw making sure it was all right, after that it idled high (about 1200) but was ok. I drove it a lil bit maybe 20miles and now it wont even idle and there is a very loud clunking noise comming from the engine from the time i start it up along the whole power cure, getting louder as the rpm goes up. Also have lost power, i can hear the turbo spooling but not getting any power, car just bogs out. Alot of stuff i know.

Help please, car has been off the road to long.

 

[dented_coffee]

CAM sensor or crank sensor.

 

[x-kiwi-x]

Crank sensor was replaced when engine was rebuilt 500m ago, and correct me if im wrong, if they were bad then the car wouldnt fire up?

 

[99evo3gsx]

Can you tell of the noise is coming from the top end or bottom end?

 

[x-kiwi-x]

Honostly no. I dont have a day off to sunday either so until then i cant do much. Just figure ill pull the valve cover and see if anything looks to funky.

 

[dented_coffee]

my sisters old saturn had a crank sensor that was bad and it was making a clunking sound and i took it off and replaced it and all was fine. the mounteing tab was broken and it was rattling something feirce.

 

[x-kiwi-x]

i just replaced the crank sensor and it was working fine. till i replaced the head.

 

[x-kiwi-x]

So iv had a couple of sugestions, just wondering what eveyone else thought before i go tearing it apart. Been told that the head gasket coulda collapsed the exhaust, which would account for the loss in power, and also a chance that since the cylinders where full of coolant that it would have put alot of stress on the bottom end throwing a rod bearing.

What you guys think.

 

[KKneipper]

Rod bearing is a possibility, but have you done a boost leak test? It could be something as simple as vacuum leak....

 

[x-kiwi-x]

Rod bearing is a possibility, but have you done a boost leak test? It could be something as simple as vacuum leak....

I did a leak test using a smoke machine at school. nothing at all, no leaks.

 

[KKneipper]

Have you done a compression test?

 

[x-kiwi-x]

I havnt done a compression test, but considering that it is a rebuilt block and head i wouldnt expect that it would be a compression problem.