Injector Pintle caps. weak point or normal
#1
Injector Pintle caps. weak point or normal
I had an injector finally go bad. completely dead on my 95 max.. run an ohm meter across the leads and get 0 I did notice the OEM tan colored pintle cap was cracked and missing all 4 little bits that go over the end of the pintle.
I checked the reading on the rest of the injectors at that time and they where fine but decided to do the remaining 5 injectors as well due to the pintle cap issue. turns out that all 6 were cracked and only 2 had 1 arm of the pintle cover left on it.
I am guessing this is more of an age related thing due to the fact my 95 has only 85K on it but will turn 20 years old in January. I will toss new seals filter and pintle caps on the old Injectors and put em aside in case I need em.
any thoughts on why the caps deteriorate or is this normal on any injector not just the Jecs ones.
I checked the reading on the rest of the injectors at that time and they where fine but decided to do the remaining 5 injectors as well due to the pintle cap issue. turns out that all 6 were cracked and only 2 had 1 arm of the pintle cover left on it.
I am guessing this is more of an age related thing due to the fact my 95 has only 85K on it but will turn 20 years old in January. I will toss new seals filter and pintle caps on the old Injectors and put em aside in case I need em.
any thoughts on why the caps deteriorate or is this normal on any injector not just the Jecs ones.
#2
I think they just get brittle with age. I had a problem with uncontrollable flooding earlier this year that turned out to be from two injectors with broken caps. I know other members who have found broken caps in the past year.
#3
I'd say normal. That little piece of plastic goes through a ton of hot/cold cycles, so it's bound to fail sooner or later.
Every used Maxima injector I've inspected, the pintle cap is either cracked, brittle, and/or missing one or more of the four teeth..
Every used Maxima injector I've inspected, the pintle cap is either cracked, brittle, and/or missing one or more of the four teeth..
#4
yet all injectors were OEM from when the car was built.
#5
Interesting observation. OEM exhaust too? My guess would be that the factory exhaust is slightly more restrictive to the rear bank than the front bank of cylinders. Notice how in the oem y pipe there is the join from both pipes into the "pre-cat holding area" lol.
#6
#9
http://www.ebay.com/itm/3-YEAR-WARRA...ac2e62&vxp=mtr
or if you just want the pintle cap, o-rings and screen, then here's an example.
http://www.ebay.com/itm/Side-Feed-Fu...fd82b3&vxp=mtr
but you have to be careful on which vendor you order from, as there are two types of injectors so the screens will be different. See here
O-rings and pintle caps are the same, so no worries there. Screens don't really wear out, so you could just gently clean them yourself and just go with new o-rings and pintle caps...the parts that really matter IMO.
Thread
Thread Starter
Forum
Replies
Last Post
jmlee44
4th Generation Maxima (1995-1999)
8
10-02-2022 02:13 PM
HerpDerp1919
3rd Generation Maxima (1989-1994)
2
09-29-2015 02:02 PM