Dont think its my injectors......

jake615615 · 11-27-2012, 01:44 PM

I have a 2002 with a LB7 in it? I have done a lot of reading on the injectors going bad. The last thing I want to do is replace them and not be my problem. Anyway the problem I am having is smoke at an idol. The smoke seems to be worse once I am driving it and warms up than sits at idol. Don’t get me wrong I do get smoke at start up but not as bad than when it is warmed up. I don’t believe it is oil, it smells like raw fuel. I have a PPE tuner in it. It does the same thing wither it is set to stock or tune 5. When I read the balance rates on the tuner, the truck is in park and at running temp all the cylinders are reading positive numbers and ranges between .7 (two of the cylinders) and the remaining 6 are right there around 2.6-2.9 according to what I have read on here that’s with in spec? I used to have a random lobe or burst of power sitting at a light. I replaced the fuel pressure regulator and that stopped that problem right away and never returned… I don’t know what to do about this smoke. I have been running cleaner in it every time I fill up. Please give me some insight as to what I should look at/test. Injectors where replaces at about 120,000 there is now 281,000. I know that’s a lot for these injectors but still I don’t have any that are above 4MS or 3 for the fact of the matter… Thank you guys in advanced for the help. Sooo glad I found a good form with good people to talk too.

jake615615 · 11-27-2012, 01:46 PM

Also forgot to mention the truck does not smoke driving down the road only at idol.

Thebiggids · 11-27-2012, 02:10 PM

Ppe doesnt read balance rates just pulse width Iirc.

Its injectors dude...id bet on it. Get return rates checked.

Thebiggids · 11-27-2012, 02:12 PM

Ms = pulse width

Mm3 = balance rates.

devo · 11-27-2012, 02:27 PM

Yeah, that raw fuel smell is a dead give away, probably returning to much fuel on one or more of your injectors. Like people always say, balance rates only tell half the story. I've had bad injectors on my old lbz and balance rates weren't showing high numbers.

Sent from my iPhone using AutoGuide.com App

jake615615 · 11-27-2012, 02:38 PM

Ok so the ppe is only reading pulse rates? What is that used to do or test anyway? I have heard of people on here say take them out and clean them? is this worth a try? With good/new injectors is there any smoke at all at an idol? What is the best and cheapest ones to buy? i would do them myself. Talked to ppe a while ago and they seem to have the cheapest ones compared to other auto stores.... thanks again for the replies!!

Stevenmc89 · 11-27-2012, 04:46 PM

Like said before, balance rates are onlyhalf the story. It definitely sounds like you need injectors.

**Brent@LDS** · 11-27-2012, 06:30 PM

Sounds like Injectors as well, You will want to replace your injectors. They have internal wear and cleaning them will not take care of your problems.

wheelinstud09 · 11-27-2012, 06:35 PM

ya call Lincoln Diesel Specialties. Great service and great products! thats were i got my injectors from!

blitzin247 · 11-27-2012, 06:40 PM

I second that go with Brent, their customer service is second to none. And their products are top notch

11-27-2012, 01:44 PM	eBay Motors #1 (permalink)
jake615615 Join Date: Nov 2012 Posts: 5	Dont think its my injectors...... I have a 2002 with a LB7 in it? I have done a lot of reading on the injectors going bad. The last thing I want to do is replace them and not be my problem. Anyway the problem I am having is smoke at an idol. The smoke seems to be worse once I am driving it and warms up than sits at idol. Don’t get me wrong I do get smoke at start up but not as bad than when it is warmed up. I don’t believe it is oil, it smells like raw fuel. I have a PPE tuner in it. It does the same thing wither it is set to stock or tune 5. When I read the balance rates on the tuner, the truck is in park and at running temp all the cylinders are reading positive numbers and ranges between .7 (two of the cylinders) and the remaining 6 are right there around 2.6-2.9 according to what I have read on here that’s with in spec? I used to have a random lobe or burst of power sitting at a light. I replaced the fuel pressure regulator and that stopped that problem right away and never returned… I don’t know what to do about this smoke. I have been running cleaner in it every time I fill up. Please give me some insight as to what I should look at/test. Injectors where replaces at about 120,000 there is now 281,000. I know that’s a lot for these injectors but still I don’t have any that are above 4MS or 3 for the fact of the matter… Thank you guys in advanced for the help. Sooo glad I found a good form with good people to talk too.

11-27-2012, 02:10 PM	eBay Motors #3 (permalink)
Thebiggids DuramaxForum Enthusiast Join Date: Jun 2011 Location: Bellingham, Wa Posts: 2,757	Ppe doesnt read balance rates just pulse width Iirc. Its injectors dude...id bet on it. Get return rates checked. __________________ Gideon 01 LB7 EC/SB Ally 4x4 shop ornament DD: 1990 4runner completely stock 4x4 3.slow Big Thanks To Adrenaline Truck Performance, Alligator Diesel Performance, and Socal Diesel

11-27-2012, 02:12 PM	eBay Motors #4 (permalink)
Thebiggids DuramaxForum Enthusiast Join Date: Jun 2011 Location: Bellingham, Wa Posts: 2,757	Ms = pulse width Mm3 = balance rates. __________________ Gideon 01 LB7 EC/SB Ally 4x4 shop ornament DD: 1990 4runner completely stock 4x4 3.slow Big Thanks To Adrenaline Truck Performance, Alligator Diesel Performance, and Socal Diesel

11-27-2012, 02:27 PM	eBay Motors #5 (permalink)
devo DuramaxForum Veteran Join Date: Sep 2008 Location: Western MA Posts: 1,113	Yeah, that raw fuel smell is a dead give away, probably returning to much fuel on one or more of your injectors. Like people always say, balance rates only tell half the story. I've had bad injectors on my old lbz and balance rates weren't showing high numbers. Sent from my iPhone using AutoGuide.com App __________________ My truck 04.5 LLY CC/SB Slt Djm/mcgaughy drop 20x10 gear 726's Big dipper IV Trans and precision converter Efilive tuned by Tony Martino(Moonshine) 12.95@103.5 w/1.79 60'

11-27-2012, 04:46 PM	eBay Motors #7 (permalink)
Stevenmc89 Senior Member Join Date: Nov 2012 Location: Enterprise, Al Posts: 326	Like said before, balance rates are onlyhalf the story. It definitely sounds like you need injectors. __________________ 2002 LB7 CC/SB 4X4, 6" RCX LIFT, 37" TERRA GRAPPLERS, 18" KMC HOSS, K&N CAI, EDGE EVOLUTION CS, STRAIGHT PIPE, NICKTANE, RANCHHAND BUMPER WITH 30" RIGID LIGHT BAR, AND OTHER DOO DADS

11-27-2012, 01:46 PM	eBay Motors #2 (permalink)
jake615615 Join Date: Nov 2012 Posts: 5	Also forgot to mention the truck does not smoke driving down the road only at idol.

11-27-2012, 02:38 PM	eBay Motors #6 (permalink)
jake615615 Join Date: Nov 2012 Posts: 5	Ok so the ppe is only reading pulse rates? What is that used to do or test anyway? I have heard of people on here say take them out and clean them? is this worth a try? With good/new injectors is there any smoke at all at an idol? What is the best and cheapest ones to buy? i would do them myself. Talked to ppe a while ago and they seem to have the cheapest ones compared to other auto stores.... thanks again for the replies!!

11-27-2012, 06:30 PM	eBay Motors #8 (permalink)
Brent@LDS DF Sponsors Join Date: Aug 2009 Posts: 395	Sounds like Injectors as well, You will want to replace your injectors. They have internal wear and cleaning them will not take care of your problems. __________________ *Looking for LB7 Injectors?* Check these prices out!.... ......... Lincoln Diesel Specialties ......... Phone: 920-765-1615 Click here For, LB7 Injector Install Instructions

11-27-2012, 06:35 PM	eBay Motors #9 (permalink)
wheelinstud09 Senior Member Join Date: Aug 2011 Location: Washington County, New York Posts: 308	ya call Lincoln Diesel Specialties. Great service and great products! thats were i got my injectors from! __________________ Mine-2001 GMC 2500HD Extra Cab Short Box DuraMax ZF6 4x4 Intake, Exhaust Bully Dog Triple Dog Girlfriends- 2002 GMC 2500HD DuraMax Diesel Allison Auto 4x4 4 Door Short Box Bone Stock

11-27-2012, 06:40 PM	eBay Motors #10 (permalink)
blitzin247 Senior Member Join Date: Oct 2012 Location: Everywhere Posts: 724	I second that go with Brent, their customer service is second to none. And their products are top notch __________________ Purchased 11/15/12: 2004 LB7 CCSB, ATS 4000 turbo, upgraded injectors, Diamond Eye 4 inch turbo back exhaust, H2's on 315/70/17's, Ranch hand front bumper. EFI LIVE by Kory Willis Purchased parts awaiting install: Moog problem solver lower ball joints, Moog pitman and idler arm, AD 165 Special thanks to: Brent@LDS, mrmanners@Synthetic Motorsports, and Kory Willis@PPEI. DMAXSTORE.COM, Your Duramax Diesel-Only Shopping Resource Jesus loves YOU, Have you asked Him to be your Savior yet?

Remove Advertisements Sponsored Links
Duramax Forum Advertisement

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode