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Old January 18th, 2017, 10:38 PM   #61
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Yep, injector cleaning next. It wasn't the cats. How much are the cats worth in scrap?

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Old January 19th, 2017, 06:25 AM   #62
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Not much
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Old January 19th, 2017, 07:02 AM   #63
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Then based on what a PITA it was to cut off, I don't know why meth heads go through the trouble.
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Old January 19th, 2017, 07:06 AM   #64
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Atleast the guy that buys them off me don't pay much..... But I think he's a bit of a shiester (sp?)
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Old January 19th, 2017, 07:25 AM   #65
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There's a scrap place near flint that says they'll pay $6 to $800 depending on the converter. I'm going with $6, maybe $10 tops. lol.
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Old January 19th, 2017, 08:07 AM   #66
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Atleast the guy that buys them off me don't pay much..... But I think he's a bit of a shiester (sp?)
that or he found a sucker.
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Old January 19th, 2017, 08:28 AM   #67
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is the misfire only during certain load or peddle conditions?
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Old January 19th, 2017, 09:49 AM   #68
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Gets worse above 2000rpm, minimal counts below. Rarely see a count at idle. I'm usally tipped into the throttle and shifted into 2 or 3 to get it happen on my test route.

I think I can homebrew an injector cleaning setup and will see if I can get the even bank cleaned and working better. I have to take apart more crap to get to the odd bank; so I will test on the less work side.
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Old January 19th, 2017, 10:07 AM   #69
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does it do it in N with no load?
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Old January 19th, 2017, 03:12 PM   #70
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maybe the random count on a cylinder, but not really.
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Old January 19th, 2017, 03:14 PM   #71
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that or he found a sucker.
More like lazy. We had two guys coming around. One paid cash (guy referenced above). The other went all legit with writing checks, waiting like three weeks after pickup to pay etc.
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Old January 19th, 2017, 03:14 PM   #72
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Did the lean codes show back up?
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Old January 19th, 2017, 03:15 PM   #73
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Here is how I cleaned my injectors...fill the bottom up with cleaner and let them soak over night



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Old January 19th, 2017, 03:26 PM   #74
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I had to clean some a few years back. I was working on a 9? gm car, 3100 engine iirc. Looked all over on the net for the best way to do it. Ended up with them in a plastic bottle with some seafoam. Let them sit in there for a day and sloshed it around once in a while. They worked great afterward.
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Old January 19th, 2017, 03:34 PM   #75
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I still got those 5 tons if interested
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Old January 20th, 2017, 11:19 AM   #76
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Quote:
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Gets worse above 2000rpm, minimal counts below. Rarely see a count at idle. I'm usally tipped into the throttle and shifted into 2 or 3 to get it happen on my test route.
you sure its not torque converter related? Does it ever happen when the TC is 100% unlocked and slipping (brake torqueing, 1st gear WOT launch, etc)?
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Old January 20th, 2017, 12:38 PM   #77
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I wouldn't think a Tc issue would show as specific misfire counts on specific cylinders?
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Old January 21st, 2017, 10:59 AM   #78
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My scrap parts fuel injector energizer. We will see if this works.

Edit:
Was able to push sea foam through all injectors on even bank, pattern looked good after running it through. No love. Thinking I am going to grab a can of carb cleaner not in a aerosol can and try again. Also going to grab quick connects and plumb in an external fuel pump I have sitting here.

2nd Edit:
Put on spare external fuel pump, no difference. Fuel pressure remained the same. Ran a can of 50/50 mix Seafoam/fresh Premium through and no better either. Didn't even put on a smoke show. Reroute PCV away from intake and capped it, then capped off the purge and EGR stuff, too. Idle map hangs around 37-39 kpa.

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Old January 22nd, 2017, 01:24 PM   #79
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Ok, last night I looked back into service manual looking for something I've overlooked. Decided this morning to start at square 1 again. Used trouble light to verify that known good and bad cylinder was firing injector. Used spark plug tester to verify those cylinders were firing. It was fine during compression test, and injectors were moving fuel with a reasonable spray pattern; so all the elements are there for combustion. Cats are gone so I know there's no exhaust restriction.

I decided to once again pull MAF sensor, and with everything else hooked up I noticed that Misfires went away. Did a quick road test and no misfires. Plugged MAF back in and while the P0102 was still in history did another drive and misfire returned. Pulled MAF and no misfires again. Gotta do some stuff this afternoon, but plan is to clean MAF again and maybe put a cheap CAI on it to see if maybe there's unmetered air coming from intake tube that TPS/MAP can adjust to. I figure the CAI will be reusable, and I want to see this run with no lights.
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Old January 22nd, 2017, 02:25 PM   #80
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i have a MAF you can borrow to test if needed.
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