# Injector hell **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [January 5, 2016, 5:57am UTC](https://community.cartalk.com/t/injector-hell/92166 "2016-01-05T05:57:01Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![Les.B](https://avatars.discourse-cdn.com/v4/letter/l/f6c823/32.png) [@Les.B](https://community.cartalk.com/u/Les.B)\ **Post date:** [January 5, 2016, 5:57am UTC](https://community.cartalk.com/t/injector-hell/92166/1 "2016-01-05T05:57:01Z")
One day the car was fine. Next day I go to start it and it had the shakes, big time. AAA’ed it to the dealer, they told me that 3 injectors were bad (V6 engine). All at the exact same time, all 3. I was told that it is common for injectors to fail in groups. Why?? They are in separate chambers. How can this be? The dealer recommended that I also replace the other 3 injectors as a preemptive measure, since they are at risk of failure. What’s the deal with injectors? ---
**Author:** ![the\_same\_mountainbike](https://avatars.discourse-cdn.com/v4/letter/t/c89c15/32.png) [@the\_same\_mountainbike](https://community.cartalk.com/u/the_same_mountainbike)\ **Post date:** [January 5, 2016, 6:01am UTC](https://community.cartalk.com/t/injector-hell/92166/2 "2016-01-05T06:01:25Z")
The reason they sometimes fail in groups is that injector manufacturing is a highly automated, very well controlled, very consistent manufacturing process. Each is almost exactly the same as the one before and the one after. Ergo, their lifespans can be remarkably similar. I agree with the dealer that you should change the others too. I would have suggested that too. You can expect them too to be at the end of their lives. ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [January 5, 2016, 6:17am UTC](https://community.cartalk.com/t/injector-hell/92166/3 "2016-01-05T06:17:44Z")
It’s hard to say? Since you don’t provide the year, make, model of the vehicle, for all we know there could be a Technical Service Bulletin that involves a problem with the injectors on said vehicle. Tester ---
**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\ **Post date:** [January 5, 2016, 6:46am UTC](https://community.cartalk.com/t/injector-hell/92166/4 "2016-01-05T06:46:30Z")
Another reason for groups of injectors to fail is debris contaminating the gasoline supply , if it gets passed the fuel filter, or the source of the debris is post fuel filter, can clog any number, including all, of the injectors in a brief time. Did you purchase gasoline at a different gas station than you normally use in the past few fill-ups? ---
**Author:** ![Sloepoke](https://avatars.discourse-cdn.com/v4/letter/s/da6949/32.png) [@Sloepoke](https://community.cartalk.com/u/Sloepoke)\ **Post date:** [January 5, 2016, 7:36am UTC](https://community.cartalk.com/t/injector-hell/92166/5 "2016-01-05T07:36:50Z")
Did you have all 6 replaced & did it solve your problem ? Did the dealer replace or recommend replacing any other parts ? ---
**Author:** ![asemaster](https://avatars.discourse-cdn.com/v4/letter/a/5f9b8f/32.png) [@asemaster](https://community.cartalk.com/u/asemaster)\ **Post date:** [January 5, 2016, 7:45am UTC](https://community.cartalk.com/t/injector-hell/92166/6 "2016-01-05T07:45:18Z")
Year, make, model, and engine size please. ---
**Author:** ![bing](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/bing/32/4619_2.png) [@bing](https://community.cartalk.com/u/bing)\ **Post date:** [January 5, 2016, 7:46am UTC](https://community.cartalk.com/t/injector-hell/92166/7 "2016-01-05T07:46:10Z")
I’ll defer to the experts but I have never had to replace an injector. (120K, 350K, 520K, etc.) Now when I was at the GM garage way back though with a sticking injector, the mechanic pointed to a Vette in the next stall that he said needed three injectors. Said the owner was not going to be pleased. I guess I’d listen to the mechanic depending on what they cost. If its the $60 variety, its not much more labor to replace the other three at the same time. ---
**Author:** ![Barkydog](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/barkydog/32/2470_2.png) [@Barkydog](https://community.cartalk.com/u/Barkydog)\ **Post date:** [January 5, 2016, 8:19am UTC](https://community.cartalk.com/t/injector-hell/92166/8 "2016-01-05T08:19:40Z")
Had a 98 or so gm truck, mechanic could not figure it out, sent to the dealer, fuel injector, there was a recent post about problems, After numerous ages I suggested fuel injector, it happens sometimes [http://community.cartalk.com/discussion/comment/3175929#Comment\_3175929](http://community.cartalk.com/discussion/comment/3175929#Comment_3175929) ---
**Author:** ![the\_same\_mountainbike](https://avatars.discourse-cdn.com/v4/letter/t/c89c15/32.png) [@the\_same\_mountainbike](https://community.cartalk.com/u/the_same_mountainbike)\ **Post date:** [January 5, 2016, 9:29am UTC](https://community.cartalk.com/t/injector-hell/92166/9 "2016-01-05T09:29:01Z")
Bing, if the injectors on that 'Vette were as hard to access as some of the horror stories I’ve heard, I can understand why the owner wouldn’t be pleased. It WOULD be interesting to know the year, make, model, & engine of the OP’s car, as ASE requested. ---
**Author:** ![ok4450](https://avatars.discourse-cdn.com/v4/letter/o/e9bcb4/32.png) [@ok4450](https://community.cartalk.com/u/ok4450)\ **Post date:** [January 6, 2016, 3:49am UTC](https://community.cartalk.com/t/injector-hell/92166/10 "2016-01-06T03:49:24Z")
I’d find it strange that 3 injectors failed. Depending upon the type of vehicle maybe the power source for the injectors is split in half with one circuit powering 3 injectors and another circuit powering the remaining 3. If a fuse lets go 3 of them die. It should be very easy to diagnose. My Mercury was wired this way. I’d replace all of them IF those 3 are legitimately bad but I’m a bit antsy about the diagnosis. What happens if they replace all 6 and the same problem exists? You really need to be on the same page with the dealer about the “what if” part of this problem.