idle issuses

1

After having replaced the exhaust system with a new stainless system as well as the catalytic converter  the engine sounds great.
Idle issues persist after starting up.
After the first acceleration the idle does not drop to low idle anymore and stays high to very high.
Checked idle control valve seems ok.
Thinking oxygen sensor? @ 200k?
we just returned from a 1500 km round trip to the snowy mountains where suddenly the engine lost power and we could run max 80 km/h.
After turning the engine off and on power came back for another 50 to 200 km.This happened about 5-6 times.
related?
Any suggestions
Thanks

Tom
2
Extremely cold air messing with the computer?

I had an old carby fed Mitsubishi express 4wd van many moons ago that did that in the high altitude and cold thin air.

I though computer controlled F/I engines didn't do that though?

Cheers,

Skot

On 7/07/2014 5:47 PM, Tom Mischler energysustained@ymail.com [Syncro_T3_Australia] wrote:
 

After having replaced the exhaust system with a new stainless system as well as the catalytic converter  the engine sounds great.
Idle issues persist after starting up.
After the first acceleration the idle does not drop to low idle anymore and stays high to very high.
Checked idle control valve seems ok.
Thinking oxygen sensor? @ 200k?
we just returned from a 1500 km round trip to the snowy mountains where suddenly the engine lost power and we could run max 80 km/h.
After turning the engine off and on power came back for another 50 to 200 km.This happened about 5-6 times.
related?
Any suggestions
Thanks

Tom

3

Tom;

A common problem is the temperature sensor for the efi system, another is a leak in the vacuum lines mine idles at 1100 rpm at the moment I asked Paul Muller about and he said that these are a couple of things that may apply, when I send it over to him for my next service I will get him to fix it, I will post the results.

Bob

 

From: Syncro_T3_Australia@yahoogroups.com [mailto:Syncro_T3_Australia@yahoogroups.com]
Sent: Monday, 7 July 2014 5:52 PM
To: Syncro_T3_Australia@yahoogroups.com
Subject: Re: [Syncro_T3_Australia] idle issuses

 

 

Extremely cold air messing with the computer?

I had an old carby fed Mitsubishi express 4wd van many moons ago that did that in the high altitude and cold thin air.

I though computer controlled F/I engines didn't do that though?

Cheers,

Skot

On 7/07/2014 5:47 PM, Tom Mischler energysustained@ymail.com [Syncro_T3_Australia] wrote:

 

 

After having replaced the exhaust system with a new stainless system as well as the catalytic converter  the engine sounds great.

Idle issues persist after starting up.

After the first acceleration the idle does not drop to low idle anymore and stays high to very high.

Checked idle control valve seems ok.

Thinking oxygen sensor? @ 200k?

we just returned from a 1500 km round trip to the snowy mountains where suddenly the engine lost power and we could run max 80 km/h.

After turning the engine off and on power came back for another 50 to 200 km.This happened about 5-6 times.

related?

Any suggestions

Thanks

 

Tom

 

4
Have you checked the throttle body for wear? It will cause high idle if it lets too much air through. Eddie.
5

Eddie,

Have not checked throttle body. How would you do that?

Tom
6
Tom , look inside at the butterfly. It should seal quite tightly all round except for where the idle adjusting screw enters it. Also might be worth checking if the flap inside the air flow meter is not sticking & moving freely. Have you checked the most obvious throttle cable? Eddie.
7
checked throttle cable - OK
rechecked idle control again and cleaned again with electrical contact cleaner - not tested it properly yet.
Tom

8
I havn't followed this thread really, so apologies if this has been covered already.

I have found honestly ...dozens, even hundreds of 2.1 waterboxer throttle swithches not making contact at idle ( zero throttle ) '.
they all wear..
years go by and no one check it, etc.

it sure helps to have a known-good idle control Valve and a known-good electronic control unit too , assuming ya all's vans are like that down there.

Scott
On 7/8/2014 6:24 PM, energysustained@ymail.com [Syncro_T3_Australia] wrote:

checked throttle cable - OK

rechecked idle control again and cleaned again with electrical contact cleaner - not tested it properly yet.
Tom