Nimbus

Had this problem for a while now. Sometimes when I accelarate hard (say in 4th) boost would come on as normal at about 3k, then I would get what feels like a loss of boost and the accelaration slows (still going faster, just not at fast). You can really feel it, all most like pulling back.

I don't have a boost gauge so can't give you numbers, just what I feel and know is happening.

Any ideas what it could be?

UK MY95
Decat centre and BB
ScoobyECU

Cheers


[Edited by Nimbus - 10/28/2003 12:40:27 PM]

Pavlo

ScoobyECU from who?

Without boost numbers the problem is almost impossible to diagnose.

Paul

Nimbus

ScoobyECU (or rather genuine 27C1028 chip) from Scott Taylor.

I think I'll try switching it back to the original chip for a while. I guess that will rule out (or in) a map issue.

Is there a sensor or something that should be cleaned that can cause this effect?

Pavlo

Can't comment.

But if you're hitting a higher boost, it may be pushing the (ageing) ignition too far, causing a misfire, in which case you're looking at new coil packs most probably.

If you're not actually getting much boost, then it could be a boost control issue.

Or Scott coud have blown a eprom with a slightly goofy rom file, it has been known.

Paul

Nimbus

There's not "feel" of miss-fire, just a lower level of boost/not as much "push in the back" (you see all the tech-speak I've put in there...).

I'll see what happens on the standard map.

[Edited by Nimbus - 10/28/2003 1:17:41 PM]

Pavlo

Putting in the standard map will not tell you much. You need a boost gauge, even if you can borrow one to rig up temporarily.

I would also speak to Scott, as he whould really be the first port of call with issues relating to the map.

Paul

Nimbus

Thanks,

I'll see if I can set up a boost guage (anyone want to loan one...? ).. I'll mail Scott as well and see what he thinks.

Cheers

marcin@klubsubaru.pl

I had similar problem once and it was a problem with the fuel pump - quite dangerous for the engine. Check the fuel pressure.
Marcin