Tech / General Engine Is your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
Sponsored by:
Sponsored by: CARiD

Major Timing Or Compression Issue

Old Oct 6, 2003 | 07:57 PM
  #1  
f-crazy's Avatar
Thread Starter
Supreme Member
iTrader: (-1)
 
Joined: Mar 2002
Posts: 1,728
Likes: 2
From: SE Michigan
Car: Bright Red 91 GTA
Engine: CARBED LT4
Transmission: MK6
Major Timing Or Compression Issue

ok guys, after my car has been sitting on jackstand since april i finally got ready to fire the motor for the first time...put the carb on, primed the bowls since they were empty and cranked her over...BOOOOM...at first i thought a shotgun went off, but it was the loudest backfire i have ever heard...right out the open header...after my ears stopped ringing, we tried again..BOOOOOM another one...again after gettin my hearing back i took the distributor out and put it back in 180 degrees.....primied up the bowls and cranked again...a little cough, hickup and then it back fired slightly through the carb igniting the unburnt ful on the main body....so we played with time a little and no difference..still wont crank over..but it coughs and hicups....i pulled out the number one plug to find the compression stroke and i didnt feel anything..i mean nothing at all...so now im really starting to worry...
when i was building the motor i made sure before i dropped it in that it had compression...i didnt do a compression check then...when i manually turned the motor over i heard the compression blow out the exhaust ports.....

when i crank it over with the starter it doesnt sound like the motor is compressing...kinda like its just spinning it over ya know...
i had my buddy tw me home and when i was i put it in 3rd and let the clutch out...and when it was turning over you could feel the pulse in the exhaust form the compression......


im really very close to getting this POS going..and im getting a littel frustrated with this ****in bull ****...

does it sound like the compression is gone or the timing is out?.....but even with the timing out a little it should still fire...

im really stumped guys...

Rob
Reply
Old Oct 7, 2003 | 06:23 AM
  #2  
ede's Avatar
ede
TGO Supporter
 
Joined: Aug 1999
Posts: 14,811
Likes: 1
From: Jackson County
did you run the valves? they right? #1 piston can be at TDC and the rotor not, you need #1 at DTC on the compression stroke, both valves closed
Reply
Old Oct 7, 2003 | 02:39 PM
  #3  
f-crazy's Avatar
Thread Starter
Supreme Member
iTrader: (-1)
 
Joined: Mar 2002
Posts: 1,728
Likes: 2
From: SE Michigan
Car: Bright Red 91 GTA
Engine: CARBED LT4
Transmission: MK6
ok i loosend the rockers and i could visably see the springs coming up...i got them all loosend up and took out the distributor out found #1 compression and put it back in...primed the carb and BOOOOOM she fired right up =)..but i have another problem...

when i key up the FP comes on and primes it up or whatever...when i crank it the the pump pumps a little and when it fires the pump doesnt pump anymore...so i have to run a wire from the 12v on/off to the fuel pump soleniod under that back seat right?....so that whenthe key is on the fuel pump will be on...and could i put a switch in-line so i can have the ignition on but flip the switch when im ready for fuel?...

thanks for the help ede

Rob
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
NBrehm
Engine/Drivetrain/Suspension Parts for Sale
1
Aug 25, 2015 11:49 PM
jharrison5
Engine Swap
5
Aug 19, 2015 05:53 PM
Feffman
Mid-West Region
0
Aug 13, 2015 07:12 AM
Feffman
Organized Drag Racing and Autocross
0
Aug 13, 2015 07:11 AM


Thread Tools
Search this Thread

All times are GMT -5. The time now is 12:27 PM.