Lean and EGR it seems from reading up here on the site. Already did a complete 60k front and upper, minus the valves. New gaskets all the way around. This eliminated all my other codes, runs a little better, but not great. This weekend Ill pull the intake and clean out the EGR tubing as described in other posts. Ive cleaned the MAF and checked for vacuum leaks, seems ok there. I havent changed the O2s yet, and good possibility the cats are done. What Im getting is high idle, it sits around 1500 and tends to stick when hit pedal. If I tap it, it will raise idle up and just get stuck around 2000, but usually if I tap it harder it will come back down. If I put it in drive/reverse with foot on brake it will drop down to 1000 or so. If WOT it revs up but stutters, not horribly bad, but enough. I cant really make out the smell, whether its hydrocarbons or not, but its fairly strong. Im just not good at deciphering the smell. I have a slight power steering leak I have yet to address, not sure if that matters. Fuel pump has a buzz to it, almost like a whirl. If theres anything you can recommend I take a look at or focus on while getting that intake cleaned out would be appreciated.
Your thoughts on these codes, 172, 136, 332
- Thread starter Wade
- Start date
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
Cleaned the Intake and nostrils. Now Im getting codes: KOEO 336, KOER 172, 136, 411. Grrr, fix one thing and another pops up. Idleing well now, but after letting it run for a while I was revving it up to make sure the idle was dropping down properly and it just died on me. Started it up, ran for like 15 seconds, then died again. Let it sit for a few, started it up and it ran fine.
Heard a few of you guys are in Denver also, would that be Bud or Bud Light to take a peak at it?
Heard a few of you guys are in Denver also, would that be Bud or Bud Light to take a peak at it?
Last edited:
136 = system lean on LH bank
172 = system lean on RH bank
336 = exhaust backpressure high or dpfe circuit voltage high
411 = cannot control rpm during self test low rpm check
From your description of the 1500 rpm idle speed and these codes, I conclude that you have a significant vacuum leak. most likely is that one of the vacuum lines to the intake was not reconnected when you reinstalled it. there are enough to easily miss one. your mission, should you choose to accept, is to find that leak.
Your fuel pump may or may not also be an issue, but that is not your main issue at the moment.
After you have found and solved the vacuum leak, you need to do the idle reset procedure to get the idle where it needs to be.
pm me if you need more help.
172 = system lean on RH bank
336 = exhaust backpressure high or dpfe circuit voltage high
411 = cannot control rpm during self test low rpm check
From your description of the 1500 rpm idle speed and these codes, I conclude that you have a significant vacuum leak. most likely is that one of the vacuum lines to the intake was not reconnected when you reinstalled it. there are enough to easily miss one. your mission, should you choose to accept, is to find that leak.
Your fuel pump may or may not also be an issue, but that is not your main issue at the moment.
After you have found and solved the vacuum leak, you need to do the idle reset procedure to get the idle where it needs to be.
pm me if you need more help.
Guess I had the DPFE hoses backwards. I changed them around so now the middle hose (pulling vacuum) is going to the intake manifold butterflies, and the outer hose is going to the plastic canister and continues on after that to the back valve cover. I changed both o2s. For the time being my codes are gone. This car was tweaked with quite a bit before I got it, guy was trying to sell it so I think a few people were trying to get it going then gave up. I really think the manual idle adjust screw has been moved, so I moved it back. Im able to set it to idle around 1000 rpms now, anything lower and it sputters. Ill give it some test runs today and see what other monster comes up.
Also, found a Schrader valve cap inside the valve cylinder below where it goes, was not the big rubber type but a smaller hard plastic type. Guess its been bouncing around in there for only god knows how long.
Also, found a Schrader valve cap inside the valve cylinder below where it goes, was not the big rubber type but a smaller hard plastic type. Guess its been bouncing around in there for only god knows how long.
Last edited:
