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Multec injectors
Thread Starter
Safety Car
Joined: Dec 2012
Posts: 3,781
Likes: 1,685
From: Summerville SC
Multec injectors
I am building up a 1986 L98 engine and I have a fuel rail from an '88 with Multec injectors # 5235302. First question that I have is are injectors interchangeable with fuel rails. I also have a fuel rail from an 85 ( it has the 2 different size ines going to it). I am not sure which rail I am going to use yet so can I put these 88 injectors in that line? Second question is that after looking a different injectors they all seem to have some type of cap on the tip. These have nothing as shown in pictures. Are they supposed to have something that got left in the intake manifold when they were pulled off. Still learning about all these injector issues so any help will be appreciated. Thanks.
Thread Starter
Safety Car
Joined: Dec 2012
Posts: 3,781
Likes: 1,685
From: Summerville SC
So if I read between the lines here, it's not even worth the time to wipe the dirt off the Multecs! And I have already gotten Jon's phone # and I am writing up some questions for him. I have had lots of experience with a '93 300 zx and it's injectors not liking ethanol etc.. At least on this car you can SEE the injectors, on that car you almost had to remove half the intake just to unclip them and ohm them out. Thanks for the replies.
Race Director
Joined: Aug 2000
Posts: 11,470
Likes: 763
I am building up a 1986 L98 engine and I have a fuel rail from an '88 with Multec injectors # 5235302. First question that I have is are injectors interchangeable with fuel rails. I also have a fuel rail from an 85 ( it has the 2 different size ines going to it). I am not sure which rail I am going to use yet so can I put these 88 injectors in that line? Second question is that after looking a different injectors they all seem to have some type of cap on the tip. These have nothing as shown in pictures. Are they supposed to have something that got left in the intake manifold when they were pulled off. Still learning about all these injector issues so any help will be appreciated. Thanks.Attachment 47941813
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Melting Slicks
Joined: Jan 2001
Posts: 2,996
Likes: 304
From: MOORESVILLE NC
Go with the injectors from FIC. I replaced mine 4 years ago and I am very pleased. I bought the fuel rail kit as I had the entire fuel rail system out of the car. Very much improved my idle and over all performance. Tough to do for a stock 88 C4.
Last edited by HAD2HAV2; Dec 28, 2015 at 08:25 PM.
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Team Owner
Joined: Jul 2004
Posts: 28,356
Likes: 3,253
From: Hartford WI
Is it that difficult? IDK. I haven't had a stock intake since 93 or 94. I have a HSR right now and it is EASY to take them out. I don't think you should waste time doing the Ohm test since they give little more than "The Coil is fine. Life is good.". IOW, a false sense of security. I'd figure on taking them out every 3 years, clean the IAC housing and TB and in the mean time, send the injectors for cleaning and testing. They get clogged up GRADUALLY so unless it is a catastrophic failure, you will be saying "I see no problem". I had that same issue on my MB. After cleaning and testing, it still felt fine. Report said we had a bunch of crud but it did feel fine. However, the mpg went up.
Thread Starter
Safety Car
Joined: Dec 2012
Posts: 3,781
Likes: 1,685
From: Summerville SC
RE: the Z. They had brackets that had to be removed to take the injector out and they each had 2 screws in them. You literally had to take the upper plenum off to access 3 or 4 of the screws,or dremel the heck out of the plenum. I have blocked most of it out of my mind ( that was the only really bad design on the entire car and I owned it and took apart a lot of it for over 10 years). It was a pain. And they wouldn't plug up, they would just out of nowhere drop out. ANyway I will be contacting FIC in the next day or two ( after the holiday family visitors leave!) Thanks to all.
Team Owner
Joined: Jul 2004
Posts: 28,356
Likes: 3,253
From: Hartford WI
RE: the Z. They had brackets that had to be removed to take the injector out and they each had 2 screws in them. You literally had to take the upper plenum off to access 3 or 4 of the screws,or dremel the heck out of the plenum. I have blocked most of it out of my mind ( that was the only really bad design on the entire car and I owned it and took apart a lot of it for over 10 years). It was a pain. And they wouldn't plug up, they would just out of nowhere drop out. ANyway I will be contacting FIC in the next day or two ( after the holiday family visitors leave!) Thanks to all.
Thread Starter
Safety Car
Joined: Dec 2012
Posts: 3,781
Likes: 1,685
From: Summerville SC
Just got off the phone with FIC and they set me straight for what I need to finish up this part of my project. Bosch 3 @ 22 lbs. for my almost stock engine. Then I can sell off the extra stuff that I won't need, extra manifold, rail and fuel lines. I'm an old guy ( just got my Medicare card!) but I still love learning new stuff. Thanks to all.