Vacuum leak?? 10@idle

[Boost95]

At idle the vacuum on my boost gauge shoudl be between about 15 and 18 right?? Mine is aroudn 10. whats should I check for? Thanks

 

[GalantGst]

yea thats really bad. either u have some crazy ass leaks or ur valve timing is off. something valve train related.!

 

[billdo_83]

yea thats really bad. either u have some crazy ass leaks or ur valve timing is off. something valve train related.!

Right. Did you do a timing belt change lately? If so looks like you need to redo it.

To check your timing quickly put the motor at TDC and look at the cam gears to see if the marks are lined up.

 

[harjms]

ok mine is at 10 also...how long should this be fixed....like should i have done it within a week or so...or could i go say...7 months? i just hope there is no long term damage...any help will help

 

[I-luv-em-all]

Also, if the motor is completly shot, you will get low vacuum. Do a compression test and see.

 

[Turbo Talon DL]

Also, if the motor is completly shot, you will get low vacuum. Do a compression test and see.

Will cams alter vacuum also? My motor is almost shot and I still had good compression, 180 accross the board, it was cold as shyt too, so that would make it lower.

 

[I-luv-em-all]

Burnt valves, worn rings will give you motor low vac. But all of those things will give you low compression results, which you obiously don't have. So start looking at other possiblities.

Edit: The motor is far from being "shot" at 180 compression across the board.

 

[BlackbirdOfPrey]

hrm, that means that I have a problem as well. -10 at idle, just changed timing belt 4k miles ago, compression check came out ok. Turbo still seems to boost ok.......

 

[Defiant]

At idle the vacuum on my boost gauge shoudl be between about 15 and 18 right?? Mine is aroudn 10. whats should I check for? Thanks

Back to Step One, where do you have it tapped, and have you checked the sensor line for kinks?

 

[Turbo Talon DL]

Burnt valves, worn rings will give you motor low vac. But all of those things will give you low compression results, which you obiously don't have. So start looking at other possiblities.

Edit: The motor is far from being "shot" at 180 compression across the board.

Well, I took it apart and i have the worse piston slap i've ever heard of. I can move the piston back and forth with my finger with little effort. All you hear when the car runs is 4 distinct clunking sounds. When you rev it a little it sounds like metal on metal pinging. My cyl. walls are scoured too from the piston slap. I dont know how i even had compression.

 

[boostyGST]

anybody know what the vacuum should read on my car.....look in vehicle profile for specifics in mmHg........need this info ASAP....please help!

thks

 

[billdo_83]

anybody know what the vacuum should read on my car.....look in vehicle profile for specifics in mmHg........need this info ASAP....please help!

thks

18-19

Re-read the question. More slowly.