« previous next »
Pages: [1] 2

Author Topic: HELP! Did my timing belt jump some teeth??  (Read 933 times)

Offline Jerry Hong

  • Full Member
  • ***
  • Posts: 216
HELP! Did my timing belt jump some teeth??
« on: January 30, 2004, 09:30:12 am »
Please help me!
My 1995 GST all of a sudden started to drive like crap after i went over a speed bump.
It won't go over 2000RPM while in gear, but i can rev it, but sounds really bad,and it has a really bad idle, under 1000PRM, no matter how much I turn the BISS screw, and is seems like it was running on 3 cyc. The idle was really rough.

So i change the wires, reset the ECU... NOTHING,
I took out the plugs, they were BLACK!
changed the plugs, and NOTHING!
I did a compression test and got 200PSI


I lined up my timing marks yesterday and found that the crank was at the BTDC mark (10 derees)!!!
Should it be there??? or be at 0 degrees?

So did I jump some teeth?

please help!

JErry
Logged

Offline Michael Cummings

  • Hero Member
  • *****
  • Posts: 2667
HELP! Did my timing belt jump some teeth??
« Reply #1 on: January 30, 2004, 02:19:41 pm »
take off your timing cover and inspect
sorry i'm lazy
Logged
1992 Talon Tsi (Sold - Owned from 02-09)
1990 Chev Astro (RIP)
1988 Yamaha FZR250 (RIP)
2008 Kawi Ninja250R (daily rider)
1998 Ford Explorer XLT (daily driver)

Offline Jeremy Clarke

  • Hero Member
  • *****
  • Posts: 2369
    • http://www.westcostdsm.ca
HELP! Did my timing belt jump some teeth??
« Reply #2 on: January 30, 2004, 02:29:14 pm »
Sounds bad Jerry. I would not run it again until you check out the timing marks. Let me know if you need anything.
Logged

Offline Eric McIntyre

  • Hero Member
  • *****
  • Posts: 1166
HELP! Did my timing belt jump some teeth??
« Reply #3 on: January 30, 2004, 07:06:28 pm »
sounds like what mine did when i jumped 2 teeth......you might get luckky like me and just need to re align it......or you could be like the person i bought the car off of and have all the valves bent(highly unlikey with the compression your pullin)
good luck
Logged
1 laser rs....sold
the only way it was doin 12's in a quarter mile was being dropped off a 1320 foot  cliff
.....stupid university costing so much

Offline John Hartman

  • Senior Member
  • Hero Member
  • *
  • Posts: 17539
HELP! Did my timing belt jump some teeth??
« Reply #4 on: January 30, 2004, 07:21:23 pm »
check for other things too, like a cracked battery, or maybe a loose maf, or other sensor plug?

Something that could get bumped off by a hard hit
Logged
91 Eagle Talon TSi 5spd awd.  GT-12, TriFlow Cams, 850s, Tial, JIC, Jackal, sticky rubber.
86 Merkur XR4Ti 5spd, rwd, turbo, 91,381km.  Original paint, heated leather. intercooled, big VAM, Full 3" exhaust, Cossie sway bar, 16" tires.
06 Mazdaspeed6 6spd awd, DISI turbo, heated leather HIDs, Corksport, Cobb, Konig, Centric...
2018 VW Golf Alltrack turbo Tornado Red, 6mt, some free mods

Offline Jordan Gladman

  • Hero Member
  • *****
  • Posts: 883
HELP! Did my timing belt jump some teeth??
« Reply #5 on: January 30, 2004, 08:46:11 pm »
find someone with a timing light?
Logged

Offline Jerry Hong

  • Full Member
  • ***
  • Posts: 216
HELP! Did my timing belt jump some teeth??
« Reply #6 on: January 30, 2004, 11:32:42 pm »
I have the cover off (its never on)... I did do the timing makes, and they are 10 degrees off when i line the cam pullies up!!!
what does it mean???
Did my belt jump?
Logged

Offline Jason Gilbert

  • Sr. Member
  • ****
  • Posts: 458
HELP! Did my timing belt jump some teeth??
« Reply #7 on: January 30, 2004, 11:39:34 pm »
I would check for a really big intake leak. If your BOV tube came off, you'd be venting to atmoshere, running pig rich (black plugs) and would not idle.

I cant see going over a speed bump being able to screw up the t-belt that bad!

Also, if it was running that poorly because of a skipped belt (would have had to skip a bit) I would think that you would have valve piston impact.

Good luck Jerry.
Logged
991 TSI AWD (Red)
The good stuff is on!
1991 TSI AWD (Black)
Whoops..Somehow its become a parts car!

"Run her 'till she melts a piston, then back the boost down a pound"

Emil_Bock

  • Guest
HELP! Did my timing belt jump some teeth??
« Reply #8 on: January 31, 2004, 01:50:37 am »
Quote from: "Jason Gilbert"
I would check for a really big intake leak. If your BOV tube came off, you'd be venting to atmoshere, running pig rich (black plugs) and would not idle.

I cant see going over a speed bump being able to screw up the t-belt that bad!

Also, if it was running that poorly because of a skipped belt (would have had to skip a bit) I would think that you would have valve piston impact.

Good luck Jerry.


He has had his Bov vented since he's had the car and hasn't seemed to have any problems with it.
Logged

Offline Jeremy Clarke

  • Hero Member
  • *****
  • Posts: 2369
    • http://www.westcostdsm.ca
HELP! Did my timing belt jump some teeth??
« Reply #9 on: January 31, 2004, 02:30:46 am »
Quote from: "Jerry Hong"
They are 10 degrees off when i line the cam pullies up!!! what does it mean???
I think it means you're doing a t-belt job in your near future unfortunately. Did you line up all the marks? (ie, did you take off the lower cover too?)
I am working tomorrow but if you are going to be around maybe I can come by on my lunch and look, since you're so close. I can get a timing light if you want one. You might be lucky and not have any bent valves. I had my belt jump due to a bad auto-tensioner and got lucky with no bending. I'll PM you my number again. I think you need to get the bottom cover off to be sure of the problem though.
Logged

Offline Jason Gilbert

  • Sr. Member
  • ****
  • Posts: 458
HELP! Did my timing belt jump some teeth??
« Reply #10 on: February 02, 2004, 05:35:34 am »
Any news for us Jerry?
Logged
991 TSI AWD (Red)
The good stuff is on!
1991 TSI AWD (Black)
Whoops..Somehow its become a parts car!

"Run her 'till she melts a piston, then back the boost down a pound"

Offline Jerry Hong

  • Full Member
  • ***
  • Posts: 216
HELP! Did my timing belt jump some teeth??
« Reply #11 on: February 02, 2004, 11:18:04 am »
Well, the timing did jump! It was off by about 4 teeth. I put it all back together, It idles fine, but i think the damage is already done, cause I notice lots of smoke from the exhaust. I also noticed some oil, in the front of my block, under the head! So i think I blew my head gasket! damn it!

But the good news was it only took me 1 hour to change a timing belt, lol :D

I haven't driven the car yet, it just idles and revs better than it did a few days ago

thanks for all the help guys!
Logged

Offline Jason Gilbert

  • Sr. Member
  • ****
  • Posts: 458
HELP! Did my timing belt jump some teeth??
« Reply #12 on: February 02, 2004, 11:35:44 am »
Ouch. Sorry to hear about that. It jumped after going over a speedbump? I'm surprised thats all it took, thats why I thought intake leak.

Ill have to watch out for speedbumps now!
Logged
991 TSI AWD (Red)
The good stuff is on!
1991 TSI AWD (Black)
Whoops..Somehow its become a parts car!

"Run her 'till she melts a piston, then back the boost down a pound"

Lowell Foo

  • Guest
HELP! Did my timing belt jump some teeth??
« Reply #13 on: February 02, 2004, 12:09:38 pm »
Quote from: "Jason Gilbert"
Ouch. Sorry to hear about that. It jumped after going over a speedbump? I'm surprised thats all it took, thats why I thought intake leak.

Ill have to watch out for speedbumps now!


Assuming you guys aren't joking.... consider that that rally cars fly over jumps at warp speed.  I doubt going over a speed bump had anything to do with a skipped timing belt.  More likely it wasn't tensioned properly.
Logged

Offline Jerry Hong

  • Full Member
  • ***
  • Posts: 216
HELP! Did my timing belt jump some teeth??
« Reply #14 on: February 02, 2004, 12:17:36 pm »
Hey Lowell,

It wasn't tensioned prpoerly!! I didn't change the usto tensioner the last time i did my timing belt (4 years ago, but my car has been sitting for 3.5 years). I know its my fault, I even knew the belt was loose....
Logged
Pages: [1] 2
« previous next »