Still Chasing idle issue - any further thoughts

[ukflyboy]

Happy New Year folks,

Got a bit more time now so continuing the chase on this problem and after this evening I can add to the list of things it is not; removed the crankcase PCV and brake servo connections to the plenum and completely bagged them up (with gasket, rubber glove, zip ties etc). Unfortunately it maintained the high revs so there isn't a leak in the system around there (or at least not one that is causing the high idle).

I don't know if there is any method to my madness here, but hooked up my multimeter to pin 3 of the ECU (Vehicle Speed Sensor) and it's Hz reading was proportional to engine speed, increasing when revved. I would have expected it to continue to read zero while it was sat still in my garage? (Edit: although most pin layouts say pin 3 is the speed sensor, TVR say that is on pin 4, which seems to telly with the multimeter readings I am getting; hope they are right?).

I still need to definitively rule out leaks, but still trying to find someone with a SmokePro or similar to properly flush them out.

Edited by ukflyboy on Saturday 2nd January 00:12

Edited by ukflyboy on Saturday 2nd January 20:06

[TVRees]

According to the Ford schematics for the 2.9i (a) the VSS is connected to pins 3 and 6 of the EEC and (b) the ignition diagnostics sensor is connected to pin 4.

On the TVR schematic, the VSS is connected to pin 4, and pin 3 is connected to something called "octane adjust", whatever that is. It is indeed a bit confusing and the TVR schematic does not really help.

I did find some test information. If you connect a Ohmmeter across the (disconnected) VSS you should get between 190 and 240 Ohms. If the resistance is not between these two values, then the VSS needs to be replaced.
From : Chilton's Guide to Fuel Injection and Electronic Engine Controls, 1984-88



Also, this page contiains some good information and may help a little ..... go to BLUES3 page

[BillC99]

Hi,
I had similar problems with my S2. I found 2 things that may be of use.

1) The pressure relief valve was leaking fuel back into the plenum via the vacuum pipe.

2) I had the fuel injectors cleaned. What a difference!!!

Bill

[v8s4me]

Maybe it's time to stop chasing the problem and try a different solution....

Don't worry about the fuel consumption, just enjoy

[phillpot]

v8s4me said:

just enjoy..............

......trying to fit that to a Cologne engine

[v8s4me]

phillpot said:

......trying to fit that to a Cologne engine

Opps, thought the ukflyboy had an S1. Never mind, a Colonge would be easy peasey

[glenrobbo]

v8s4me said:

Opps, thought the ukflyboy had an S1. Never mind, a Colonge would be easy peasey

Joe, with the exception of the V8S, all the S Series were fitted with Cologne engines. Some were 2.8, later ones were 2.9. Very few were fitted with Colonges, because they were just too wobbly. And only available in pink or white. Tasty though
The Essex was a 3.0 V6 as fitted to the 70's 3000M & 3000S*. I know this because I'm still an Essex boy at heart.

• The 3000S was fitted with a folding hood. Martin Lilley must have got the idea from you.

Edited by glenrobbo on Thursday 7th January 09:23

[v8s4me]

glenrobbo said:

..Joe, with the exception of the V8S, all the S Series were fitted with Cologne engines. Some were 2.8, later ones were 2.9. Very few were fitted with Colonges, because they were just too wobbly.....

Thanks Glen. As someone once said ""A day without learning is a day wasted. There is so much to learn and so little time to learn it."

But..

glenrobbo said:

.. all the S Series were fitted with Cologne engines. Some were 2.8, later ones were 2.9. Very few were fitted with Colonges, because they were just too wobbly ...

Presumably you mean very few were fitted with wobbly "Essex" engines?

With all due respect to the great Martin L, he could only manage to make one with side screens. If someone would like to give me a 3000M for my "significant" birthday I bet I could do it properly, and fit wind-up windows, and a design a dash with a decent layout. Having to get your passenger to tell you what rpm you're doing seems a bit daft to me

Note to Andy - it's finished and I'll be sending it later!

[glenrobbo]

v8s4me said:

Presumably you mean very few were fitted with wobbly "Essex" engines?

No Joe, the 3.0 Essex V6 was not at all wobbly compared to the Colonge:



Just as well TVR never fitted this derivation:

[TVRees]

Looks like someone needs to get this thread back on track. It's gone all soft and semolina like and we've all desserted the original problem