Idunno

Hello. Just a PSA to those interested about fuel injectors / which to buy.

I have a 96 and a 98.The 96 idles very smoothly but the 98 was idling with a slight stumble, which I can't stand, and I fussed around trying to get it to smooth out. It was needing the usual tune-up stuff (plugs/cap/button/wires) which I replaced but the stumble remained. Then I removed the injectors and made an attempt to clean them. Using a piece of fuel hose on the injector inlet (clamped) and an air hose male fitting on the opposite end of the fuel hose (also clamped), I filled the hose with injector cleaner. Then, with the electrical contacts connected to the battery via a harness I made, I attached an air hose to the fitting. It blew the injector cleaner through the injector. I did this several times per injector. That being the best I could come up with as a method for cleaning them, I reinstalled them. Sure enough, the stumble remained.

Last week I got on Amazon and ordered a 6-pack of fuel injectors for about $44.00 total. They arrived yesterday and I installed them this afternoon. The whole job with clean-up is about 1/2 hour. That solved the stumble. I took the truck for a drive around town (stop/idle/go) and am impressed with the results; very smooth idle and acceleration.

The injectors I bought are in the link below. They differ a lot from the ones I pulled out. The old ones are black and have a single hole. The new ones are yellow/orange, have four holes and the injector body is slimmer. Otherwise, they are the same length, have the same o-ring port sizes, the same connector receptacle and accept the old fuel rail clip retainers as the old ones. They also come with a 1-year warranty, which I have not yet gone online to register.

Mortgage Payer

Probably Chinese.
Let us know how long they last.

I've been using rebuilt Boschs from Dodge Neons.

Cummins93

At that price they are without a doubt non genuine. Keep in mind the injectors themselves act as buffers for the injector driver circuits inside the ECU.

dave1123

Not to disagree, but as far as I know all the PCM/ECU does is ground the injectors to turn them in for a short time to control mixtures. Digital drivers. I doubt even a different resistance value would make a difference. Anyway, they are probably better than the junk Siemans that the factory put in.

Idunno

Yup. Just a momentary ground pulse to inject a new charge. If anything, the computer's pulse duration would be the only thing in question (all other determinants ruled out). Been driving the 98 around town doing shopping chores and have to say I'm pretty happy with the smoothness of the idle and acceleration. Going to get a new reading on the mileage this week. The exhaust "signature" sound and firing rhythm at the tailpipe before and after are like two different engines. I'm guessing one or more of the old injectors had orifices worn over-size, were hanging up (delay), or a combo of both. In any case, it's pretty obvious the timing and/or quantity of fuel passing through them were different. The mileage will probably show an up-tick by a GPM or more.

BTW, the new injectors as-listed on the site have some excellent reviews that, for $44.00, I was willing to trust. You'll always get your bad reviews but, to my eye, you can spot who knows what they're talking about and who doesn't. Besides, they have a 1-year warranty. You just need to keep the card that comes with them because on it is Amazon's product identification number that must be referenced for a smooth return transaction.