t3 surge and stop

TasDub Casual Dubber

36 posts · joined Jun 2006 · 9 Nov 2006, 12:11 pm

#553789

my t3 van has a surge problem.when at operating temp and idling the revs will die and come back [this takes about 5-10 secs] about 3 or 4 times a minute.when driving around town sometimes when you put your foot down to accelarate it will pause for a couple of seconds and then go. i am only guessing that these 2 conditions have the same cause. any suggestions. also any suggestions on a good repair manual. thanks in advance

greedy53 Bishop of Volkswagenism

3,062 posts · joined Mar 2006 · 9 Nov 2006, 2:04 pm

#553812

when was the oxy senser changed in the exhaust

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TasDub Casual Dubber

36 posts · joined Jun 2006 · 9 Nov 2006, 2:25 pm

#553817

no idea greedy 53. where is it and what does it look like?

greedy53 Bishop of Volkswagenism

3,062 posts · joined Mar 2006 · 9 Nov 2006, 6:19 pm

#553857

i should ask what motor are you using this is for a 2.1 water cooled

it should be fitted in the cat just before the muffler and it looks like a round plug with 2 wires comming out they should be changed every 100000 klm's it controls your fuel computer telling it how to measure the fuel in and can cause all kinds of trouble and there is no way i know of testing them

[ Edited on 9-11-2006 by greedy53 ]

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TasDub Casual Dubber

36 posts · joined Jun 2006 · 9 Nov 2006, 8:42 pm

#553912

yes,its a 2.1 water coolled,89, done 240 k. the sensor is there and is connected.the exhaust pipe adjacent to the cat has a new piece in it. about 150 mm long. it is as if it was put in to replace something ? can you recomend a supplier for a new sensor? any ideas on price?thanks again

johny rotten Officially Full-On Dubber

366 posts · joined Apr 2004 · 10 Nov 2006, 7:07 am

#553980

it won't be the O2 senser keep looking elswhere

johny rotten Officially Full-On Dubber

366 posts · joined Apr 2004 · 10 Nov 2006, 7:08 am

#553981

check intake system for air/ vacuum leaks

TasDub Casual Dubber

36 posts · joined Jun 2006 · 12 Nov 2006, 4:33 pm

#554599

johny rotten,thanks for the input.this arvo after work i checked the intake system joints that are visibible in the engine bay.they all look like they are properly fitted together,square and not crooked,feel tight, and then i sprayed them lightly one at a time with aerostart.wonderful stuff.there was no change in engine speed .i guess that rules them out but it was good to check them .

Kombi_Rescue Wolfsburg Wizard

440 posts · joined Feb 2005 · 12 Nov 2006, 6:44 pm

#554637

looks lioke the ignition timing is way too far advanced..the ecu compensates and retards the system..to chechk timing disconnect water temp senor disconnect a yellow plug with green wire at the fire wall engine should rev up and set the timing mark on the crankcase join....this is only one suggestion with little info to hand hope it helps you can u2u me for some further suggestions cheers steve

Iwish4aSynchro Wolfsburg Wizard

639 posts · joined Aug 2006 · 13 Nov 2006, 12:33 pm

#554855

Kombi_Rescue wrote:looks lioke the ignition timing is way too far advanced..the ecu compensates and retards the system..to chechk timing disconnect water temp senor disconnect a yellow plug with green wire at the fire wall engine should rev up and set the timing mark on the crankcase join....this is only one suggestion with little info to hand hope it helps you can u2u me for some further suggestions cheers steve

If he is a learner i would not suggest the worst case scenario.
And i am pretty certain but the ecu does what it does and if it aint broke dont fix it, this only applies to the ecu. Not this is not my philosphy.
Clarity in question. Check as suggested the O2 sensor about 98 bucks with lanyard from Repco mob. If this is not answer to prob, have a look at the throttle body and check to see the throttle position sensor's location. Depending where this is set can and does have adverse affects on one's vanagon, when in conjuction with air sensor/regulator at the air intake box.. Confusing i understand; try writing it.
Happy hunting

Keep the steering and the propulsion seperate . Still a Kombi...

It's all good, until it's bad, i suppose

Iwish4aSynchro Wolfsburg Wizard

639 posts · joined Aug 2006 · 13 Nov 2006, 12:38 pm

#554859

Next have you had a look at what is coming out of the rear, colour of the pipe?
Will need more info. but hope this all helps
Apologies to you Steve no disrespect meant.

Keep the steering and the propulsion seperate . Still a Kombi...

It's all good, until it's bad, i suppose

greedy53 Bishop of Volkswagenism

3,062 posts · joined Mar 2006 · 13 Nov 2006, 6:51 pm

#555003

try a new coil i had i bit of fun with one that got hot and failed

[ Edited on 13-11-2006 by greedy53 ]

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Iwish4aSynchro Wolfsburg Wizard

639 posts · joined Aug 2006 · 13 Nov 2006, 9:02 pm

#555069

Coil will be showing evidence at startup, yeh? Could be the prob though, i was thinking about the description of " when you put your foot down it will pause for a couple of seconds and then go". Sounds more like fuel than electrics. But as thes are the only two things that will make it run like a hairy goat or beetle on steriods depending on the end of the scale. I could almost think TasDub could be heading in the general direction of troubleshooting your T3.

Keep the steering and the propulsion seperate . Still a Kombi...

It's all good, until it's bad, i suppose