Have you had the throttle body rebuilt with new seals etc? When Simon at SPS rebuilt mine, he had to source a new butterfly valve as mine was badly worn and allowing too much air to flow past when closed.The SciVision is up and running again with the loom sorted and a brand new Bosch MAF unit. I've got an almost brand new AFM tucked away for the next rainy day!
I can only go on AFR's however it idles at mid 14's now so it doesn't seem rich, and the AFR's across the range are spot on.
One small issue I have, and haven't been able to sort so far, is that warm idle is nearly 1.1k revs, cold idle is normal around 850/900 rpm. TPS possibly but it seems to be working and clicking when it should as you can see fueling stops off throttle (AFR gauge shows this) and recommences for idling purposes.
It's been like that since the engine build 2 years ago.
Edit to add - with the aircon switched on, warm idle is pretty much back in spec, so it's a head scratcher!!
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Turbo Engine Rebuild
- Thread starter scam75
- Start date
scam75
Well-known member
Haven't had the throttle body rebuilt, I know it leaks a little from the butterfly pivot holes on each side as we ran a smoke test when trying to find a fault when the engine was rebuilt and wouldn't fire up.
However, why is it fine when cold and then not fine at full operating temp?
I'll have a look at the TB at some point but for now it's little more than a minor inconvenience!
The ICV could also be the problem, never played with that either.
However, why is it fine when cold and then not fine at full operating temp?
I'll have a look at the TB at some point but for now it's little more than a minor inconvenience!
The ICV could also be the problem, never played with that either.
scam75
Well-known member
Road Trip update. 415 miles so far and the tools have only made a brief appearance as the boost line popped off the banjo pipe. Another new way to lose boost control!
Anyway, I only had small tie wraps so managed to double tie wrap it. Will put a small jubilee clip on if we pass a hardware store.
Short leg today, Scarborough to Whitby. Fish suppers for dinner tonight!
Car has been a joy to drive. Still on first tank of fuel @ 415 miles, need to fill up today, bit more economy than I expected so all good!
Stuart
Anyway, I only had small tie wraps so managed to double tie wrap it. Will put a small jubilee clip on if we pass a hardware store.
Short leg today, Scarborough to Whitby. Fish suppers for dinner tonight!
Car has been a joy to drive. Still on first tank of fuel @ 415 miles, need to fill up today, bit more economy than I expected so all good!
Stuart
scam75
Well-known member
Sounds good! Plenty boot space between us for tools and spares!!Sounds awesome Stuart, I hope to do a euro trip when mine is back on the road.
Maybe we should have a 944 rebuilt engines group trip
Sounds like you may be passing mine on the way back?Road Trip update. 415 miles so far and the tools have only made a brief appearance as the boost line popped off the banjo pipe. Another new way to lose boost control!
Anyway, I only had small tie wraps so managed to double tie wrap it. Will put a small jubilee clip on if we pass a hardware store.
Short leg today, Scarborough to Whitby. Fish suppers for dinner tonight!
Car has been a joy to drive. Still on first tank of fuel @ 415 miles, need to fill up today, bit more economy than I expected so all good!
Stuart
scam75
Well-known member
Last day of the trip today, in Dunbar with about 650 miles done. Port Seten and Berwick today before rounding off the journey back home.
Car has been great. A few cracking overtakes on the A1 yesterday up the East Coast. Boost line to the banjo still happily connected.
Roads a bit greasy today so a leisurely jaunt home beckons.
Car has been great. A few cracking overtakes on the A1 yesterday up the East Coast. Boost line to the banjo still happily connected.
Roads a bit greasy today so a leisurely jaunt home beckons.
scam75
Well-known member
Home sweet home, 750 miles tucked away, what the car was made for. Faultless other than the banjo pipe incident, but can forgive that!
Makes all the hard work worthwhile and wouldn't hesitate to go on another long trip. Effortless miles, some great roads and scenery, and of course plentiful injections of boost when called upon!
Time for a stiff drink!
Makes all the hard work worthwhile and wouldn't hesitate to go on another long trip. Effortless miles, some great roads and scenery, and of course plentiful injections of boost when called upon!
Time for a stiff drink!
scam75
Well-known member
New gear shifter kit arrived today so duly fitted it. The pin on the old one was very very worn! A quick test drive showed a nice improvement and now reverse gear engages straight away with no fuss.
Also now a dab hand at popping the plastic bearing cup on and off the bottom of the shifter!
Kit came with the shift lever, 4 x washers, 1 x circlip, 1 x white plastic bearing cup and some fitting grease. Decent for £49 delivered. Waleswood 944 on eBay, Justin Webb.
I would have preferred the Only944 kit but double the price when you factor in carriage from the states persuaded me to opt for the Waleswood kit. There is now no play or slop, so my shift rod must be still in decent nick unlike the pin on the lever!
Stuart
Also now a dab hand at popping the plastic bearing cup on and off the bottom of the shifter!
Kit came with the shift lever, 4 x washers, 1 x circlip, 1 x white plastic bearing cup and some fitting grease. Decent for £49 delivered. Waleswood 944 on eBay, Justin Webb.
I would have preferred the Only944 kit but double the price when you factor in carriage from the states persuaded me to opt for the Waleswood kit. There is now no play or slop, so my shift rod must be still in decent nick unlike the pin on the lever!
Stuart
scam75
Well-known member
Reading David's wonderful updates on his build thread has prompted me to add a (very) little update to my thread.
Now on 10,750 miles since my build. All running beautifully. Oil use negligible and no oil leaks anywhere. No coolant leaks and expansion tank happily sits at max all the time. This is worth noting as previously it was never happy at max, instead would be happy when sitting at the minimum mark on the tank.
Gear shift is much improved with the new (to me) gearbox, billet linkage and front lever and bush. It is however a bit hard to engage 2nd in below freezing temps. A mile or two of driving and it is back to silky smooth. My old box also done this, both before and after rebuild. Do they all do this? Be interested to hear from any other idiots that take their turbo s gearboxed cars out in sub-zero temps!
The car still idles at just over 1k revs when warm, sits where it should when cold, and also when warm with AC on. I think this must be SciVision related, and it really isn't an issue I need or desperately want cured, more a small anomaly. I do have an almost new turbo AFM in the cupboard I could swap out if I ever feel the need to see if it makes a difference.
Stuart
Now on 10,750 miles since my build. All running beautifully. Oil use negligible and no oil leaks anywhere. No coolant leaks and expansion tank happily sits at max all the time. This is worth noting as previously it was never happy at max, instead would be happy when sitting at the minimum mark on the tank.
Gear shift is much improved with the new (to me) gearbox, billet linkage and front lever and bush. It is however a bit hard to engage 2nd in below freezing temps. A mile or two of driving and it is back to silky smooth. My old box also done this, both before and after rebuild. Do they all do this? Be interested to hear from any other idiots that take their turbo s gearboxed cars out in sub-zero temps!
The car still idles at just over 1k revs when warm, sits where it should when cold, and also when warm with AC on. I think this must be SciVision related, and it really isn't an issue I need or desperately want cured, more a small anomaly. I do have an almost new turbo AFM in the cupboard I could swap out if I ever feel the need to see if it makes a difference.
Stuart
scam75
Well-known member
I changed the transmission fluid quite a while back, the short shift linkage perhaps makes it more noticeable when the fluid is cold though.
Thanks guys. It is probably a worn synchro then which is not uncommon. The fluid is new in my box and it has definitely had a rebuild at some point with the previous owner, I have no idea when though. Short shift could well be to blame for making it a touch worse when cold.
I do and always have gone easy on 1st to 2nd changes, especially from cold. I'll do another fluid change next year. I bought fluid when I got the box, but when we went to drain it the stuff inside looked brand new, so we just left it. I don't however know what fluid it is though! I've just assumed it would be a decent fluid as it seemed to be a very well cared for car that sadly toasted itself.
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