Fuel injectors

[Markus2001]

On my 1996 jeep Cherokee I'm getting a code for injector pulse and number 3 injector stuck open. They are the stock single hole injectors. Who has everyone gone with to replace the fuel injectors?

 

[Bent]

I went through K suspension.

 

[Anak]

I send my old injectors out to Injector RX in Texas. They clean and flow test them.

 

[1986PIONEER]

I ended up buying a reman'd set of Chrysler 4 hole injectors.

 

[Markus2001]

I went through K suspension.

That's what I been looking at they have 4 and 12 hole

 

[Tim_MN]

My 1998 has almost 290,000 miles on the original injectors and it runs great and gets excellent gas mileage. When two of them cracked and started to leak externally, I picked up a handful of used XJ injectors from the junkyard.

If necessary, I would suggest a 4 hole Bosch injector with the correct flow rate.

 

[Wayne Sihler]

I think I got a set from 4 0 Motorsports. But its been years ago.

 

[Bent]

That's what I been looking at they have 4 and 12 hole

They are a supporter, at the chapter level, as well. Please thank them if you do end up ordering from them.

 

[75SV1]

I've done the Ford/Bocsh 4 holes on two '98. I didn't notice any more power or MPG. I do think the motor(s) ran smoother. I have done the 12 holes on two XJs. One of the '98s and on a 2000. At first the '98 seemed to have a bunch more power. Then it went back to what it was with in a week. On the other, it ran about stock. Although I had run it a bunch trying to get some issues taken care of. Nver know what an EMC programming might do.

 

[Ol Blue]

Before you do something drastic, try cleaning them and replacing the O-Rings. Carb cleaner plus O-Rings is $10-15 and may fix your issue. I did this a few weeks ago and it made a big difference with snappiness and smoothed out my idle. Tons of videos out there about how to clean injectors. Took me less than an hour to do all 6.

 

[75SV1]

I did have an issue with injector O-rings. I think from the set of 12 holes I bought for the 2000 XJ. They were from one of the more reputable places. One or more of the black o rings in the intake manifold has rotted in about 2-3 years. Years ago, some O-ring kits came with brown o rings. They were to be put in the intake manifold holes. The black ones in the fuel rail. I bought some Cometic ones from Oriley's. They are a silver gray.

 

[Bent]

One or more of the black o rings in the intake manifold has rotted in about 2-3 years.

Using red rubber grease may help with that. Petroleum and silicone based lubes can accelerate O ring failure.

 

[Anak]

Dow-Corning makes a product specifically for O-rings: Molykote 55

Buy a tube and it will probably last you a lifetime.

Amazon Linky for the tube I bought in 2018

And it looks like you can also get it in a 0.5 oz little tub

 

[maxbraketorque]

A couple of drips of motor oil on each o-ring?

 

[Bent]

I'll stick with the Red.
I picked mine up at the local Toyota dealership. And yes, as Anak mentions; a tube will last forever.

 

[Markus2001]

I've done the Ford/Bocsh 4 holes on two '98. I didn't notice any more power or MPG. I do think the motor(s) ran smoother. I have done the 12 holes on two XJs. One of the '98s and on a 2000. At first the '98 seemed to have a bunch more power. Then it went back to what it was with in a week. On the other, it ran about stock. Although I had run it a bunch trying to get some issues taken care of. Nver know what an EMC programming might do.

I'm going threw k suspension and give them a try

 

[75SV1]

Using red rubber grease may help with that. Petroleum and silicone based lubes can accelerate O ring failure.

Noted. I have used Vaseline or such for Orings in the past. I bought some lube for Orings at a True Value a couple of years back. The Oring I replaced was very bad. Others were OK. Some say only to use Orings sourced from the US.
So, not off shore. Also, the same with other rubber parts.