Emissions problem
FTE Legend
Joined: Nov 2015
Posts: 30,915
Likes: 4,123
From: Angier, NC
I couldn't say I think it depends on the model cause Ive seen some diesels at work given they are older and some were Chevrolets but they had vacuum brakes not hydroboost. I could not say on the vacuum aspect.
Like I tell my boss over and over again, I know the basic theory of operation but I am not a diesel tech.
Like I tell my boss over and over again, I know the basic theory of operation but I am not a diesel tech.
With some exceptions there is no throttle plate in diesels. On old mechanical injection systems the throttle simply allows more fuel. With drive by wire it's the same except the fuel increase is computer controlled. Thus you can make lots of smoke with an old one by adding lots of throttle when under load. Diesel engines are set up to gulp as much air as they can. Thus dialing back the injector pump might be an answer here but unless there is a blockage in the intake more air is not to be had without a super or turbo charger.
My diesel did not make bost un-less you were under power. You could throw rpms up & down and boots gauge would not move.
The EGT gauge would move but that was it.
So at idle the turbo was not adding any more air to lean out the pump and why I think mine failed the state test after the pump was rebuilt and turned up for the turbo.
That is what I found with my chevy 6.2 with turbo
Dave ----
Lead Driver
Joined: Apr 2007
Posts: 5,958
Likes: 105
From: Houston
If the one I know for sure ever comes back in I will make note of year/make/model and post it on here.
I know there is one for sure I don't know if the Izuzu boxvan we did had vac or not on the brakes but it was a 3 cylinder diesel.
I know there is one for sure I don't know if the Izuzu boxvan we did had vac or not on the brakes but it was a 3 cylinder diesel.
Thread Starter
|
Freshman User
Joined: Oct 2015
Posts: 45
Likes: 0
From: Thornton CO
So I don't think that my vehicle has a throttle plate or at least I don't know because I can't find anything on the internet regarding it and my vehicle model.
I was reading about the turning the injector or fuel pump (excuse my lack of knowledge in this subject ) down so I can compensate for the altitude.
Can anybody give me some instructions on how to do this or would I have to take it to a mechanic to do it?
I also apologize for the delay on my replies. I've been busy with work and whatnot but I appreciate the help from everybody!
I was reading about the turning the injector or fuel pump (excuse my lack of knowledge in this subject ) down so I can compensate for the altitude.
Can anybody give me some instructions on how to do this or would I have to take it to a mechanic to do it?
I also apologize for the delay on my replies. I've been busy with work and whatnot but I appreciate the help from everybody!
FTE Legend
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
Here are a few hits on "tuning injector pump Ford IDI":
6.9L & 7.3L IDI Injection Pump Tuning
Tuning, Turning, Tweeking the IDI 7.3
6.9L & 7.3L IDI Injection Pump Tuning
Tuning, Turning, Tweeking the IDI 7.3
Thread
Thread Starter
Forum
Replies
Last Post
THE BLUE HEAP
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
14
Mar 28, 2012 04:34 AM
