Engine/Transmission (1998.5 - 2002) Need Advice

[BKOMP]

I just had rv275 injectors, a new lift pump, and valves set a week ago and now I have a 50-100rpm lope at idle, and the truck starts very hard. Used to touch the key and it was running, now it seems that I have to hold the foot feet down in order for it to start decent. It also seems to still smoke alot on cold starts (under 32 F). I thought the bad injectors were to blame for that. Any help would be appriceated.

 

[JLandry]

BKOMP,



Welcome to the TDR forum. Please fill out your signature and your profile so we know what you have and will be able to help you better.



It sounds like you could possibly have a leaking or sticking injector. You can try to isolate which injector is causing the problem by loosening one high pressure injection fitting (on the side of the cylinder head) at a time about 3/4 turn with the engine at idle. Be careful and keep your skin away from these fittings as fuel will be released at a very high pressure. When you loosen a fitting, it will cause the associated injector to stop operating. If it was working correctly beforehand, a noticeable miss or lope quality will occur in the idle. If the injector was NOT working properly, there will be little or no change in the idle quality.



Questions:



Who did the work?



Are the injectors all new Bosch units, or were new aftermarket nozzles installed in old nozzle holders?



Was this "lope" there immediately after the injector installation, or did it come on gradually afterwards?



Does the engine otherwise seem to run and perform normally above idle?



Best regards,



John L.

 

[BKOMP]

I had a injection shop in St. CLoud, MN do the work. They were supposedly new bosch injectors and I don't know about the holders. I didn't seem to notice right away but I didn't drive it alot until the 12" of snow this last weekend. It seems to run good above idle.

 

[Joe Mc]

Need more data . . . what year etc is your truck so we can better help. Sounds like an injector isn't working correctly - though.

 

[BKOMP]

'01 quad, 4x4, auto, stock other than the rv275 injectors.

 

[BKOMP]

'01 quad, 4x4, auto, stock other than the rv275 injectors, 172k

 

[Sticks]

I'd be leaning towards a fuel leak somewhere (at least for the hard start). Seen a lot of the fuel line quick connects get weak over time, particularly the one on the inlet side of the LP.

The older O-rings in the connectors do not play well with the ULS diesel.

Does the lope go away after running the engine for a while?

 

[BKOMP]

I looked around for an external leak, not a drop. The lope only seems to become noticeable when it gets to temp.

 

[Sticks]

I looked around for an external leak, not a drop. The lope only seems to become noticeable when it gets to temp.

Not all leaks will actually produce external showings, even under pressure. Leaks will allow air to get in and either let the fuel system drain back to the tank (allow significant amounts of air in the fuel lines) or pull air in while running.

Will it start up right away within a couple minuets of shutdown, or is it hard start all the time?

Lope at operating temp points to something changing when it warms up (metal expansion). Back to sticking injector, fuel leak in the head (between the injector line, crossover tube, and the injector), and maybe a leak in the supply line.

Any DTC's set. Timing issue maybe?

One of the injector hold downs not torqued?

Why did you have the LP replaced in the first place? P0216 code?

I am presuming by "Foot Feet" you mean the throttle. Throttle position has 0 effect in starting the truck.

 

[BKOMP]

The LP was leaking externally. I thought the same thing with the throttle but two of the three times that I struggled to start it I had cranked the engine alot and when I opened the throttle it started instantly? I have it back at the shop where I had the injectors installed so hopefully they find something.

 

[Joe Mc]

Does the oil have an essence of fuel odor? Like mentioned above there could be a leak at the inj tubes. I'd have the shop where its at pull the tubes and check the o-rings, heck just have them replaced since they're going to pull the tubes to check - cheap insurance.

Keep us posted.

 

[BKOMP]

The injection shop just called and said they checked pressures and they got a code p0216. They didn't retorque the inj. tubes or clear the code and see if it comes back, I asked them to do that and let me kow. Am I looking at a vp44 or should I be looking at something else.

 

[JLandry]

Am I looking at a vp44 or should I be looking at something else.

Assuming the P0216 DTC repeated returns after being cleared, then yes... ultimately you will need to install a rebuilt VP44.



The P0216 means the VP44 couldn't achieve the amount of injection advance as requested by the ECM. It's a classic DTC that shows up when a VP44 is wearing out internally. Thankfully it usually doesn't mean the VP44 will quit right away. Sometimes they continue to work for years while occasionally throwing the P0216 DTC... but then sometimes not. You should have plenty of time to order a replacement without paying rush charges, etc.



Good luck,



John L.

 

[BKOMP]

Do you guys think that that was my starting issue or are they going to find an injector issue to.

 

[BKOMP]

They quoted me $1500-1600 for a pump installed is that the going rate.

 

[Sticks]

Yes, that would most likely be your starting problem.

Yes that is a good price for install, unless you have the mechanical means and tools to do it yourself in 1-4 hours, then you are just looking at the cost of a new pump.

 

[Batphreak]

Sounds about right, around $1k for the pump and about $400-$600 for install.