how easily does it start ?
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how easily does it start ?
Yes the ERG was removed when I got the car.
Starting is usually fine...
When warm/hot it always starts first time.
When cold it will start first time, immediately followed by low rpms (600-700) and rough idling for 4-6 second before jumping into its smooth idling.
When it's been left for like 2+ days cold I will start first time, but the drop on Revs will sometimes drop so low it stalls. Usually starting fine the second time.
A bit strange.
It started showing these starting symptoms after the head gasket replacement 2 years ago.
Since then I have changed the glow plugs and the injector washers/O-rings were done when the gasket was.
This is on my list but always thought it would likely be un-related.
re check the cam timing
Check the intercooler that it's not split
I am officially confused.
Tested a few configurations today:
- MAF plugged in,10 threads on wastegate actuator, wastegate modulator plumbed as per factory. max 16 PSI while driving.
- MAF plugged in,10 threads on wastegate actuator, wastegate modulator plumbed as per factory but blanked at wastegate actuator (no hose to actuator). max 16 PSI while driving.
- MAF plugged in,10 threads on wastegate actuator, wastegate modulator bypassed, wastegate actuator plumbed straight to inter cooler pipe. max 16 PSI while driving.
- MAF plugged in,12 threads on wastegate actuator, wastegate modulator bypassed, wastegate actuator plumbed straight to inter cooler pipe. max 16 PSI while driving.
- MAF plugged in, 9 threads on wastegate actuator, wastegate modulator bypassed, wastegate actuator plumbed straight to inter cooler pipe. max 16 PSI while driving.
- MAF UN-plugged in,10 threads on wastegate actuator, wastegate modulator bypassed, wastegate actuator plumbed straight to inter cooler pipe. max 18 PSI while driving. (did not overboost)
Does this show that these is a boost leak in the system?
This boost leak must have appeared while i was at the shop fitting the MAF sensor (previously the car would not be limiting boost with the MAF unplugged)
The MAP sensor seems to be reading correct values on the last nanocom run.
Guess i will be taking out and checking the intercooler hoses tomorrow (for the third time now)
I can't follow all those tests you made with different wastegate setups and MAF scenarios cos you should have made only one relevant test: with MAF unplugged and clamped hose to actuator, not bypassed or removed cos once removed it is a boost leak there if it's not clamped... never mind cos it's quite obvious with that 16psi reading all over the place that there is a boost leak somewhere or the turbo is not producing enough boost... btw did you read the boost with a gauge or it's based on nanocom ?
geez with the modulator pipe disconnected on mine it sees 28PSI.
Regards PhilipA
Because your's is producing enough boost unlike the OP's and as long as it doesnt go to overboost at 28psi it must be tuned as well
The 28Psi was only seen momentarily because the hose to the wastegate had broken. It then went into overboost. I just posted that in comparison to the posters test when with modulator bypassed he only got 16-18 PSI. Mind you , you have to have foot down with a trailer up a hill for that to happen. I doubt whether it would spike to 28 unless those conditions are met, not normal driving.Quote:
Because your's is producing enough boost unlike the OP's and as long as it doesnt go to overboost at 28psi it must be tuned as well
I have a Turbo technics wastegate controller that cuts at 22PSI for normal running and my map has been altered to allow that without overboost cutout. The turbo technics boost controller allows much faster boost rise above 15PSI whereas by shortening the rod there is always boost bleed above 15PSI as I am pretty sure that the shortened rod causes the flap to be partially open..
Regards PhilipA
How would that happen?Quote:
I am pretty sure that the shortened rod causes the flap to be partially open..