Multec Injector Numbers
Thread Starter
Burning Brakes
Joined: Oct 2004
Posts: 898
Likes: 1
From: Pearland Texas
Multec Injector Numbers
Well my car crapped out after a minor spark plug change out today. It ran around the block and never restarted once parked. I did put the ohm meter to the injectors. Is this right, the Ohm meter set to 1x and zero'd out with leads touching together ? The numbers are as follows, #1-17 #3-8 #5-18 #7-12,,, #2-16.5 #4-17 #6-9 #8-20 Ohms.
The injectors are another problem. I will address the car not starting in another thread.
The injectors are another problem. I will address the car not starting in another thread.
Melting Slicks
Joined: Apr 2002
Posts: 2,118
Likes: 0
From: St. Charles, MO Route 66 Corvette Club
Kodavette has seen a GM service bulletin that indicates the resistance should be 16.5 +/-.3 ohms. I have changed out the injectors in my 89 and know others that have had Multec problems. The resistance has always been in the 16 to 17 ohm range. A reading of less than 16 ohms indicates that injector coil is starting to short out. Good luck with this problem. I suggest you try and keep the same injector rating when you get new parts. For your reference, here is what the GM Multecs look like:
Le Mans Master
Joined: Feb 2005
Posts: 5,146
Likes: 3
From: The Motor City
Originally Posted by Dads90
Any suggestions for a new set. I read about many on this forum, but I need reasonably priced comparable replacements ( say that three time 
)
)
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,062
From: altered state
St. Jude Donor '05
Originally Posted by mseven
For yours an FMS (ford/bosch)22# should be a good choice, check summit racing for prices.
Thread Starter
Burning Brakes
Joined: Oct 2004
Posts: 898
Likes: 1
From: Pearland Texas
Will 21.5 lbs compared to my present ones make at 22 lbs. make a differance in performance ? Probally anything working right is better than the multecs working bad. I dont want to shortchange myself.
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
Originally Posted by Dads90
Will 21.5 lbs compared to my present ones make at 22 lbs. make a differance in performance ? Probally anything working right is better than the multecs working bad. I dont want to shortchange myself.
Example: Stock injectors for my 86 are 21.6lb/hr and is accepted at 22lb/hr.
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Thread Starter
Burning Brakes
Joined: Oct 2004
Posts: 898
Likes: 1
From: Pearland Texas
Thanks for all the info guys
, one more thing.... Does the Ohm readings change if the car is hot or cold ? These readings were made on a cold engine. Looking for injectors now. Will stay in touch.
, one more thing.... Does the Ohm readings change if the car is hot or cold ? These readings were made on a cold engine. Looking for injectors now. Will stay in touch.
Drifting
Joined: Apr 2005
Posts: 1,281
Likes: 12
From: New York
I tried a new set of Bosch's in my 1991, and it ran great. I just couldn't get over the clatter they make. It sounded like I had a solid lifter cam in the car. I went back to the Multitechs, and I got them from FiveO, no problems now, and the car runs like normal.
Melting Slicks
Joined: Dec 2004
Posts: 3,284
Likes: 51
From: Jacksonville, FL
St. Jude Donor '08 thru '26
Yes ohms will....
Originally Posted by Dads90
Thanks for all the info guys , one more thing.... Does the Ohm readings change if the car is hot or cold ? These readings were made on a cold engine. Looking for injectors now. Will stay in touch.
, one more thing.... Does the Ohm readings change if the car is hot or cold ? These readings were made on a cold engine. Looking for injectors now. Will stay in touch.Just in case you go with GM replacements be aware that there is some question that GM actually changed anything to address the methanol's effect on the coils of the replacement parts with respect to the specific model yr vette the replacement part is desiginated for. I think that is the reason that most replace injectors using parts other than GM's.
Tom
Drifting
Joined: Oct 2006
Posts: 1,934
Likes: 3
From: Citrus Heights California
Originally Posted by mseven
For yours an FMS (ford/bosch)22# should be a good choice, check summit racing for prices.
Originally Posted by RRT vette
