Just wondering how ip and Injectors go bad

[mustangmatt89]

My truck has 230,000 on it, it smokes a tiny bit at start up but not much and clears up in about a minute occasionally while idling for a while it will smoke a bit but only if you are really looking for it right in front of the pipe, the truck runs great and gets great gas mileage. So my question is when an injector pump usually goes bad does it leave you some where or just start smoking alot and poor power and fuel economy before it goes I don't want to be stuck on the side of the rd.

 

[HammerDown]

"gas mileage"...come-on, I would expect that from a yuppie

I had 190,000 on my original IP and BB injectors. My truck always started and ran great...I did notice a slight amount of puff at idle.
When I tested my original injectors they were ******* like a cow >a solid stream, not very efficient.
I sent Mel my IP and he rebuilt it to original specks (I think better than original) and I installed a NEW set of BB code injectors.
In short, since owning my truck since new 1988, I didn't realize how power dropped over the 20 + years. It has more grunt for sure, leaves a red light like it's a$$ is on fire. "FUEL mileage" seems a bit down but it's not timed yet and my foot is in it a little more.
It has more grunt for sure,
I doubt you engine will leave you stranded, as usually the IP will give you some warning.

 

[mustangmatt89]

never been called a yuppie, a redneck yes but not yuppie, sorry I race gas motors most of the time still use to gas talk and when I mean mileage I mean from like 17 which I get now to like 9

 

[HammerDown]

never been called a yuppie, a redneck yes but not yuppie, sorry I race gas motors most of the time still use to gas talk and when I mean mileage I mean from like 17 which I get now to like 9

17 mpg down to 9...I'd be checking things. Maybe compression, valve springs/guides and of course the injectors and IP, Filters too!
Auto or manual? Severe trany slip will kill mileage too.

 

[icanfixall]

The first question you need to answer before anyone can answer yours is did you put all the posted miles on the motor??? The reason for that question is if you are responsible for these posted miles then you got more than twice the life from the pump and injectors. Otherwise how many miles are on the pump and injectors??? Mostly you will see a drop in mileage along with some smoke at differant times... A hard start issue can happen called heat soak. Thats when a ring in the pump wears so much that it can't create enough pumping pressure to pop the injectors on a hot restart... Then you can try some cool water poured on the end of the injection pump. Caution doing this cause the pump shaft can break because the ring shrank so much it froze up the pump. Others may come along with other pump issues.... Hope this kinda helps some...

 

[mustangmatt89]

Well nothing seems to be wrong yet I don't know if someone has ever schnged them out or not. Never have I had a problem starting while it was hot ever

 

[Agnem]

As an injector pump wears, there are generally 3 things that go wrong with it, all at the same time.

1) fuel deliver decreases
2) timing retards
3) the ability to adjust and/or hold timing through the throttle range decreases.

There are other failure modes that can result in hot start problems, missing, rough running, or just letting you sit, but these 3 things are happening right now to every pump that is on the road. These changes are so gradual that you will not be able to notice it. That is, until you replace the pump. Then you say "OMG!" I didn't realize how bad it had gotten... I thought it ran great.

With injectors, they generally are no longer "perfect" after about 10,000 miles. The spray pattern starts out as a perfect cone, and slowly collapses into a stream. The pintle will stick due to fowling, and this results in wasted fuel, bad cylinder timing, and an occasional miss.

If this is a new to you truck, spend the $800 or so on a new fuel system, and then you have some history and can be assured of getting the best power and economy your truck can deliver.

 

[Titojeep]

I'm new to the IDI community and can say that the advise given above was useful to me. When I aquired my truck a few months ago (free in a machine trade) it had 199K on the clock. The milage was about 13 on a good day, and about 11 avg. It smoked a little a start up, but if you got on the throttle it would smoke alot. When driving it was great until you tried to stay at the indicated speed, specifically the 70MPH range. At that point, if I let of the throttle (to hold speed) it would sputter. Replaced the pump, and injectors, and Holy Cow!!!! Felt like I put on a turbo. Now milage is 15.5 @ 70mpg, runs like a champ! I also found out during the replacement that the original pump was a high altitude set up as per the mfg ID #. Being as I don't live at high altitude, I opted for the standard set up. Freaking runs great.