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24th March 2013, 04:51 PM
#1
Tb42 revving high after backfire
Hello
My patrol has started to idle high, it back fired on fuel last night, and since then it holdes 1800-2000 rpm all the time got or cold. Started it up this morning and it holds 1200-1800rpm and won't go down after warming up.
What could this be and is there a solution, from what iv read the tb42 has a few problems with the auto choke ?
Any help would be appreciated
Thank you for your time
Marti
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24th March 2013 04:51 PM
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24th March 2013, 06:22 PM
#2
Travelling Podologist
Have no idea if this will apply to a Patrol, but a few years ago I had the same thing happen to a Ford XF efi wagon I had running on gas. What had occurred was that the back fire had distorted some sort of 'flap' in the air box. A new air box was going to cost an arm & a leg, but a local bloke managed to tweak the existing flap & solved the problem.
2006 4.2TDi ex-Telstra Remote area Camper. 425w roof mounted solar, 360Ah Aux batts, BCDC1240, Onboard hot & cold pressurised & filtered water, (25 litre hot water calorifier), ARB fridge, ARB freezer, Built in kitchen, heaps of easy access storage, 240v, 3” Genie exhaust + dynotune, 2” lift, 3900kg GVM upgrade, second glovebox, ROH Blaktrak steel wheels, Bridgestone D697's (now Toyo RT's), Redarc gauges/pillarpod, Hema HX-1, Icom 450 CB, dual rear view cameras, Onboard 30amp Victron mains charger, second glovebox, dual seat conversion, TPMS, Boss PX7 onboard air with 9 litre tank, 350w inverter, Steel bullbar, Harrop Eaton diff lock (front), Warn winch, Snorkel, Dual spares , 160 litre water tank, 180 litre fuel in two tanks (approx 1200km range) 2010 Tvan Tanami. (incl another 70 litre water tank) with matching wheels/tyres (& 3rd spare)
A Nomadic Life (Blog)
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25th March 2013, 11:49 PM
#3
Is it a carby or efi motor
is it dual feul and the idle is high in LPG? - possible blown mixer
1991 GQ LWB 4.2 Carby dual fuel, 32 mud claws, 2 inch lift, LSD's front and back
And its Toooooooo High for the Ball & chain
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26th March 2013, 06:14 AM
#4
Patrol Guru
Re: Tb42 revving high after backfire
Hi mate sorry to hear. I had the same issue with a TB42E big enough to dent my bonnet from debris. When this happen the car went into survival mode with the base idle at 2k. It ended up being the MAF.
tip it tap it slap it
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26th March 2013, 08:13 AM
#5
Patrol God
Re: Tb42 revving high after backfire
Yeah as said above, a backfire can damage parts of the fuel system. I reckon it would be worth checking for any distortions in the butterflies or airbox area. Also look for any leaks that may be letting air in.
FanTapstic!
Hello from Under Down Under!
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26th March 2013, 10:39 AM
#6
It is a carby, idles same on fuel as it does gas, no flaps or visible damage anywhere, I pulle the auto choke apart and cleaned it, still idles high, on my way home 20 mins into my drive it settled back to normal ish idle, fuck knows whays happened. Ill look at the throttle butterfly's today and see if
Anything going on there
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26th March 2013, 11:53 PM
#7
I might have jammed the fast idle cam in the wrong position (its the white thing on the side of the carby below the autochoke.)
1991 GQ LWB 4.2 Carby dual fuel, 32 mud claws, 2 inch lift, LSD's front and back
And its Toooooooo High for the Ball & chain
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27th March 2013, 01:43 AM
#8
Ok anything I can do to rectify the problem
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28th March 2013, 04:47 AM
#9
Patrol Guru
Re: Tb42 revving high after backfire
Originally Posted by
GQ TANK
I might have jammed the fast idle cam in the wrong position (its the white thing on the side of the carby below the autochoke.)
Sorry mate carby not for me I sincerely hope its an inexpensive fix.
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28th March 2013, 10:18 AM
#10
Originally Posted by
GQ TANK
I might have jammed the fast idle cam in the wrong position (its the white thing on the side of the carby below the autochoke.)
Mine loves to do this.
Simple fix just a PITA to get to.
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