Cylinder 5 and 8
03-24-2011, 11:32 PM
#1
Cylinder 5 and 8
I have no combustion in these two cylinders...
Compression Good, Spark Plug Cables (MSD Super Conductor) appear to be routed correctly. Someone have a Diagram? I'm using 30lbs Accel Injectors (Yellow Casing). How can I check to see if they may be the problem? Spark at Distributor, Check. Please Help!!! I will retest compression tomorrow.
Compression Good, Spark Plug Cables (MSD Super Conductor) appear to be routed correctly. Someone have a Diagram? I'm using 30lbs Accel Injectors (Yellow Casing). How can I check to see if they may be the problem? Spark at Distributor, Check. Please Help!!! I will retest compression tomorrow.
03-27-2011, 05:58 PM
#5
Re: Cylinder 5 and 8
I removed the spark plug boot from the distribtor and pulled it away slowly looking for the spark to jump. Do I pull the spark plug boot from the spark plug and pull it away slowly to see if the spark travels from spark plug wire to the spark plug or do I remove the spark plug wire and spark plug and then reconnect the two to check if the spark plug is sparking?
03-27-2011, 06:02 PM
#6
Senior Member
Join Date: Sep 2009
Location: Downers Grove, IL
Posts: 516
Likes: 0
Received 0 Likes
on
0 Posts
Car: 91 Z28 / 04 GTO
Engine: GMPP 350 TPI / LS1
Transmission: WC T5 / T56
Axle/Gears: 3.23 / 3.46
Re: Cylinder 5 and 8
try moving those plugs to different cylinders, and if you feel adventurous do the same with your injectors. if the problem moves where you swapped parts you'vefound the problem.
03-28-2011, 11:09 PM
#7
Supreme Member
iTrader: (13)
Join Date: Apr 2005
Location: Not in Kansas anymore
Posts: 7,734
Likes: 0
Received 11 Likes
on
11 Posts
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: Cylinder 5 and 8
Should see good spark across plug gap.
Trending Topics
03-29-2011, 11:11 PM
#9
Senior Member
Join Date: Sep 2009
Location: Downers Grove, IL
Posts: 516
Likes: 0
Received 0 Likes
on
0 Posts
Car: 91 Z28 / 04 GTO
Engine: GMPP 350 TPI / LS1
Transmission: WC T5 / T56
Axle/Gears: 3.23 / 3.46
Re: Cylinder 5 and 8
you can ohm test them without removing the few rail. Get a DVOM digital volt/ohm meter and set it to 2k ohms, measure the resistance of each injector. for our cars they should be around 16ohms but anything about 12 is fine as long as all of them are within 2 ohms of each other. BUT they can ohm out good and be clogged causing a funky spray pattern.
04-08-2011, 10:38 AM
#12
Senior Member
Join Date: Sep 2009
Location: Downers Grove, IL
Posts: 516
Likes: 0
Received 0 Likes
on
0 Posts
Car: 91 Z28 / 04 GTO
Engine: GMPP 350 TPI / LS1
Transmission: WC T5 / T56
Axle/Gears: 3.23 / 3.46
Re: Cylinder 5 and 8
you can't really wire them incorrectly, they either get voltage or don't. what did you get for an ohm reading? have you tried unplugging the injectors and having someone spray starting fluid down the intake? You could do that and at least know they're firing. The last thing I would check is the pickup coil in the distributor. Sorry for the long winded post but you have an odd problem.
Thread
Thread Starter
Forum
Replies
Last Post
