Injector Seals went Bad while tuning my car
 

Hey Guys

so my injector seals went bad while John was tuning my car. There is a misfire on Cyl 1 and now I have to wait till this ass long Weekend to get quotes on fixing it.

mine as well do spark plugs too.


im really happy with the work John was doing, he manage to get me 305 WHP at 12 PSI on a Mustang Dyno

Mad props to @Visconti and also MR Performance who help me out with bad Fuel Pump Installation

If you guys ever need any performance work go to them, they are nice people with lots on Knowledge and for tuning go with John @Visconti

OUCH.. I wonder how long will mine last...

I dont, think that long
I've had my kit for 500 miles

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I dont, think that long
I've had my kit for 500 miles


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Mine are 7,000 miles in ???? And still working

in my opinion, I think the early cars had this problem.

my car is from July

someone else had this too right?

Oh my car is this year I got it in feburary

I wonder if the new flash will prevent this entirely.

How does the seal go bad?
Is it a rubber o-ring that can be had at Autozone or something?

@whitefrs was that 12psi 305hp power made on the bad misfire? Seems the number is low on 12psi .... But all and all enjoy and welcome to the boost family lol get a set of tires next trust me lol

interesting on the seals, mine haven't gone bad yet, but im at 11 psi. I've been boosted for 2k miles or more.

It's a teflon seal very low on the direct injectors. Apparently knocking high temperatures will melt them.

just read the codes on my CEL

P117B and P1171 Bank 1 too lean

this has got me kind of worried. my car is in the shop getting a turbo kit right now, and i haven't had any of the TSB updates people are talking about. I just got my car a month or two ago, should I be safe from this? how long ago did they figure this out and start correcting them at the factory?

How are you 1000% sure it is your DI seal that is shot?

Welcome to the turbo world bud

as per @Visconti

More detail, what is the car doing that would lead him to reach that conclusion?

im not really sure as im new to all this tuning stuff, so maybe @Visconti can chime in but from my understanding the car was running too lean

^^^ so the 305? Isn't the real power u will most likely make more ?

oh i'm not new to the turbo world. nearly every car i've owned in the last 10 years has been turbocharged. i'm a long-time fan of turbocharging lol. i just want to know whether or not my car is effected.

Really??? I want more power

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So, you got on the Dyno, were running lean, got helped with fuel pump install, got the fuel pump install sorted out but still was running lean? Just trying to get as much info as possible and see if by any chance I have it too, not trying to be an ass at all.

My advice to you, whenever someone tells you something and you really don't know or understand, ASK. That is how you will learn!!

whats your power goal?

I'm at about 4k on the turbo and got mine in july. No issues with this...

Will talk to john more about it

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350 whp

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I was wondering if these are the stock injectors or aftermarket. I have seen a few issues with the design of aftermarket ones (I'm a hydraulics mechanic for aircraft). The seals on the aftermarket pumps and a injectors don't seem to be up to par. I would use high temp back up teflon rings on the back side of a high grade seal. This will make you good for temps over 300 degrees and pressures up to 6000psi. It's over kill but better to have to much than to little.

We are talking here about the Direct Injectors, there are no aftermarket direct injectors. The aftermarket injectors people swap out are the Port Injectors.

If it were the Port Injectors, this would not be a big deal, since they are extremely easy to replace and are very common. The issue here is the DI are harder to reach and different than the regular injectors we see on every car, so the install procedure is different too.

Thanks, in the meantime, can you confirm the above post are the steps things happened if you remember? Or if you can provide more details? Again just trying to figure out if I have the problem before using the car again.

1) got on the Dyno, were running lean, got helped with fuel pump install,

no. i was running AFR 11.2 at 7 psi. i was perfect

2) got the fuel pump install sorted out

we increase the psi to 12 and than the fuel pump was by passing the tank, so we remove the pump and the pump waas loose, it wasnt installed correctly

3) still was running lean?

im running lean at higer rpms

My mistake I thought it was the port injectors.

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but what im really wondering is that if i had a bad injector seal that means i would have a misfire and a CEL will come showing code p0301 but no its showing other code

@King Tut and @Pure Automotive

we all have the same kit. had u guys had this problem

That's interesting. I had a million issues with Fuel Pump install. The last one was running lean at higher RPM's. BUT, I removed the Fuel Pump, installed with two extra O rings about 3 weeks ago, and since then have had zero issues. I have been staying at 11's to 12's AFR WOT at high RPM's

we did the same thing with @Visconti last night

Just found this info online

Moron statement...

EDITED

yes it was showing lean at higher rpms

I'm sorry, I brainfarted. One thing does not have to do with the other. What I was trying to say is that if your Gauge is also showing lean, you could rule out your O2 sensor being bad.

You said you did not go into boost, so that means you guys kept the wastegate open as to not build boost when trying to see if you were going lean?