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Author Topic: Misfire/erratic idle with video, update please read  (Read 3340 times)

Offline Chris#101

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Misfire/erratic idle with video, update please read
« on: 19 January 2013, 19:23 »
Hi all just gone to start my car and it has an erratic idle / misfire. Ive taken it for a quick spin and on very light throttle the car is bucking yet the throttle is kept in the same position. How ever under hard acceleration it seems to drive fairly smooth. Considering this has been r-tech'd Nd running 232bhp +258lbs ft+ it seems fairly flat to normal.

I've. Cleaned out the maf, checked coil packs are fully pressed down/ connected anything else I should check?

Coil packs were replaced under warranty within a year ago because of the recall.

I have fault codes 17511 & 16514 lambda related.

Here's a video

http://m.youtube.com/watch?v=N7FkA1YAZy8&feature=plpp

Please help
« Last Edit: 21 January 2013, 17:09 by Chris#101 »
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          2003 1.8T: R-tech Live Cutom Stage 2 remap: N249 Bypass : Forge T.I.P : Forge 007p  : Forge Actuator, yellow spring : Toyosports F.M.I.C : Toyosports C.A.I :                                                                   PCV simplified - oil catch can : 42' Draft 3" turbo back non res exhaust system : Devils own W.M.I : 231bhp & 258lbs-ft

Offline Chris#101

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Re: Help with warning light and fault codes.
« Reply #1 on: 19 January 2013, 19:23 »
.
« Last Edit: 20 January 2013, 13:04 by Chris#101 »
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          2003 1.8T: R-tech Live Cutom Stage 2 remap: N249 Bypass : Forge T.I.P : Forge 007p  : Forge Actuator, yellow spring : Toyosports F.M.I.C : Toyosports C.A.I :                                                                   PCV simplified - oil catch can : 42' Draft 3" turbo back non res exhaust system : Devils own W.M.I : 231bhp & 258lbs-ft

Offline Chris#101

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Re: Misfire/erratic idle with video, please help
« Reply #2 on: 20 January 2013, 13:10 »
Thought I'd recycle my old  thread with a new problem  :rolleyes:
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          2003 1.8T: R-tech Live Cutom Stage 2 remap: N249 Bypass : Forge T.I.P : Forge 007p  : Forge Actuator, yellow spring : Toyosports F.M.I.C : Toyosports C.A.I :                                                                   PCV simplified - oil catch can : 42' Draft 3" turbo back non res exhaust system : Devils own W.M.I : 231bhp & 258lbs-ft

Offline Wazzzer

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Re: Misfire/erratic idle with video, please help
« Reply #3 on: 20 January 2013, 16:40 »
If those faults are lambda related it could be throwing your fuelling about all over the place. Can you get some lambda logs?
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Offline Chris#101

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Re: Misfire/erratic idle with video, please help
« Reply #4 on: 20 January 2013, 16:52 »
Quote from: Wazzzer on 20 January 2013, 16:40
If those faults are lambda related it could be throwing your fuelling about all over the place. Can you get some lambda logs?

Had the lambda codes for a few weeks now which I've been meaning to get round to sorting, dunno whether these new symptoms are related or not.

The roads round here are deadly ATM and traction control is kicking In every few seconds literally, so I've unplugged both plugs on the throttle body as I've had a similar problem before. Plugged them back in and the erratic idle has pretty much gone away but it's incredibly flat to drive :undecided:?

Unable to take any logs unfortunately
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          2003 1.8T: R-tech Live Cutom Stage 2 remap: N249 Bypass : Forge T.I.P : Forge 007p  : Forge Actuator, yellow spring : Toyosports F.M.I.C : Toyosports C.A.I :                                                                   PCV simplified - oil catch can : 42' Draft 3" turbo back non res exhaust system : Devils own W.M.I : 231bhp & 258lbs-ft

Offline Chris#101

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Re: Misfire/erratic idle with video, please help
« Reply #5 on: 21 January 2013, 17:09 »
Right Ive just unplugged the maf and it seems to have a nice steady idle and no boggyness to it. Is it safe to go for a quick blast with maf unplugged to see if it has gotten rid of misfire?

Also just thinking out loud, IF the maf is fubaredd could that be throwing the fueling out, bringing up error codes 17511 & 16514 lambda related or the other way round?

thanks in advance
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          2003 1.8T: R-tech Live Cutom Stage 2 remap: N249 Bypass : Forge T.I.P : Forge 007p  : Forge Actuator, yellow spring : Toyosports F.M.I.C : Toyosports C.A.I :                                                                   PCV simplified - oil catch can : 42' Draft 3" turbo back non res exhaust system : Devils own W.M.I : 231bhp & 258lbs-ft

Offline Chris#101

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Re: Misfire/erratic idle with video, please help
« Reply #6 on: 21 January 2013, 20:03 »
Quote from: Chris#101 on 21 January 2013, 17:09
Right Ive just unplugged the maf and it seems to have a nice steady idle and no boggyness to it. Is it safe to go for a quick blast with maf unplugged to see if it has gotten rid of misfire?

Also just thinking out loud, IF the maf is fubaredd could that be throwing the fueling out, bringing up error codes 17511 & 16514 lambda related or the other way round?

thanks in advance

Does a knackered maf throw up codes?
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          2003 1.8T: R-tech Live Cutom Stage 2 remap: N249 Bypass : Forge T.I.P : Forge 007p  : Forge Actuator, yellow spring : Toyosports F.M.I.C : Toyosports C.A.I :                                                                   PCV simplified - oil catch can : 42' Draft 3" turbo back non res exhaust system : Devils own W.M.I : 231bhp & 258lbs-ft

Offline rio_gti

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Re: Misfire/erratic idle with video, update please read
« Reply #7 on: 21 January 2013, 20:22 »
Bad maf doesn't always throw up a code, apparently it's not wise to drive with it unplugged but if it was mine I would  :lipsrsealed:

If it could be that buggared try givin it a clean with maf cleaner (or carb cleaner but a tiny ammount!!!)
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Offline pickles

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Re: Misfire/erratic idle with video, update please read
« Reply #8 on: 22 January 2013, 09:18 »
what engine code. iv a AGU and i was getting similar symptoms, i ended up changing the n75 which helped a bit but problems stopped when i changed MAF, think my CAI is a MAF Killer lol
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Offline Dalo Harkin

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Re: Misfire/erratic idle with video, update please read
« Reply #9 on: 22 January 2013, 12:24 »
Quote from: rio_gti on 21 January 2013, 20:22
Bad maf doesn't always throw up a code, apparently it's not wise to drive with it unplugged but if it was mine I would  :lipsrsealed:

If it could be that buggared try givin it a clean with maf cleaner (or carb cleaner but a tiny ammount!!!)

ran mine with it unplugged for a long time, I know its not advisable, but only because it runs on default values.
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