9th injector problem
Thread Starter
Intermediate
Joined: Jul 2011
Posts: 44
Likes: 1
From: Granite City Illinois
9th injector problem
I believe this is the 9th injector on l98. It's on the driver side runner. This must be a common problem because it is just a terrible design. My 9th injector sticks out at the bottom and causes a huge vacuum leak. My car will only run for like a minute. Has anyone else came up with a way to rig this?
Safety Car
Joined: Jan 2004
Posts: 3,556
Likes: 13
Not a common complaint on here
A round item fits into a round hole
Obviously your injector is not seated square into the bore it fits into
Remove and refit it
A round item fits into a round hole
Remove and refit it
Last edited by vetteoz; Mar 8, 2012 at 11:45 PM.
Le Mans Master
Joined: Aug 2010
Posts: 9,272
Likes: 17
make sure its seated properly, make sure the flange that the bolt goes thru is flush with the mounting surface and not forced and make sure the o-ring is not damaged. When I swapped intakes , mine was not seated properly
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
The cold start injector is the round white object under the PCV vacuum tube in the center of this picture:
The cold start injector only works while cranking. It is controlled by the cold start switch mounted on the front of the intake manifold under the throttle body. The cold start switch has a thermal timeout and will turn off the cold start injector after 8 seconds or if the coolant temperature is higher than 95 degrees.
The cold start injector only works while cranking. It is controlled by the cold start switch mounted on the front of the intake manifold under the throttle body. The cold start switch has a thermal timeout and will turn off the cold start injector after 8 seconds or if the coolant temperature is higher than 95 degrees.
Last edited by Cliff Harris; Mar 9, 2012 at 11:47 PM. Reason: Added description of cold start switch.
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Is that some sort of Mod where you get a bit of extra boost when you need it......
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Le Mans Master
Joined: May 2006
Posts: 9,226
Likes: 9
From: Irvine Ca
I was just joking at first, had no clue there was a 9th injector.
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
It is only activated when engine is cranking over and then it only operates if engine is below a specified temp to add extra fuel like a choke on a carb engine
You don't need to remove the injector to disable it; simply unplugging the elec connector it has same effect ;you can leave the injector in the hole as a plug
Only '85 has a ancient slow ECM
86-89 use the same '165 ECM
Last edited by rodj; Mar 11, 2012 at 07:16 PM.
Le Mans Master
Joined: Aug 2010
Posts: 9,272
Likes: 17
CSI doesn't affect engine operation.
It is only activated when engine is cranking over and then it only operates if engine is below a specified temp to add extra fuel like a choke on a carb engine
You don't need to remove the injector to disable it; simply unplugging it has same effect ;you can leave the injector in the hole as a plug
Only '85 has a ancient slow ECM
86-89 use the same '165 ECM
It is only activated when engine is cranking over and then it only operates if engine is below a specified temp to add extra fuel like a choke on a carb engine
You don't need to remove the injector to disable it; simply unplugging it has same effect ;you can leave the injector in the hole as a plug
Only '85 has a ancient slow ECM
86-89 use the same '165 ECM
