View Full Version : Turbo Problems
Hi,
I'm still having problems with my car. I seem to get a lot of lag when the first turbo spins up.
I kind of get 3 or 4 psi boost, hesitation for about a second, then full boost.
Anyone know what this might be?
Dude put some iridium plugs out of another car into my car before I picked it up. Can swapping plugs from different cars have adverse affects?
I'm gonna check the plugs tonight.
Do Halfords do decent plugs? If so what make/model etc.
Cheers,
Paul.
It's your plugs :D
Try regapping them down or get a new set to get rid of the hesitation.
Originally posted by Supera
It's your plugs :D
Try regapping them down or get a new set to get rid of the hesitation.
Thanks,
what should the gap be??
Paul.
.030 ~ .032 depends on how much boost your running
Originally posted by Paul R
Thanks,
what should the gap be??
Paul.
iridiums come pre gapped. you shouldnt need to change them and dude knows what hes doing
Originally posted by Supera
.030 ~ .032 depends on how much boost your running
I'm running standard boost 0.9 bar.
So what shuld the gap be?
What is .030 in metric?
Paul
Originally posted by leett
iridiums come pre gapped. you shouldnt need to change them and dude knows what hes doing
OK, what should the gap be in metric? so I can check?
Paul.
Originally posted by Paul R
OK, what should the gap be in metric? so I can check?
Paul.
about 0.8mm i think
Bugger. Cant do it! it's too dark and the extension for my spanner has gone missing!!
When I start her up, it's turning over a lot before it fires. Could this be plugs too?
Paul.
Same as loids post , ring me tommorrow and i'll tell you what NGK's to put in , those iridiums were coolder than stock so it could be that !!!!
Dude:flame Dev
Originally posted by dude
Same as loids post , ring me tommorrow and i'll tell you what NGK's to put in , those iridiums were coolder than stock so it could be that !!!!
Dude:flame Dev
OK, cheers dude.
Matt Harwood
11-02-04, 09:32
I could see how plugs could cause a misfire, but I'm not sure they're going to hold your boost down for a second or so... They'd be far more likely to stop you reaching full boost by causing a misfire, but you'd know about that, and not at stock boost levels, (unless the plugs are totally shot!).
I think there's another problem somewhere, but I hope not, for your sake! :(
Originally posted by Matt Harwood
I could see how plugs could cause a misfire, but I'm not sure they're going to hold your boost down for a second or so... They'd be far more likely to stop you reaching full boost by causing a misfire, but you'd know about that, and not at stock boost levels, (unless the plugs are totally shot!).
I think there's another problem somewhere, but I hope not, for your sake! :(
Oh bugger, your making me worried now :confused:
Check the vacuum hoses , when is the delay is it 1st to 2nd??
dude:flame Dev
Originally posted by dude
Check the vacuum hoses , when is the delay is it 1st to 2nd??
dude:flame Dev
Nope, it's when the first turbo starts to boost, I can feel some power, then hesitation for a second, then 0.6 bar. Second turbo kicks in normally and quickly.
Paul.
Right,
A bit more info. I just took the car out again. The delay is from when the boost guage gets to 0bar, to when the boost starts to rise.
Another symptom is that when accelerating, the car judders a bit. Also when I let my foot off the accelerator and decelerate there is some juddering again.
The idle is also lumpy when idling
I've had a look at some HKS plugs. It appears that the gaps are going to be 1.1mm iridium or 0.8mm platinum, s40G I think??
Obvioulsy I dont want to buy these if it's not the plugs! :(
Cheers,
paul.
Matt Harwood
11-02-04, 16:00
Sorry to sound all doom and gloom, but just get yourself some cheapish NGK BKR7E's. They're well proven plugs and not too expensive to find out it's not the plugs...
A gap of 1.1 should be fine on stock boost, 0.8 is generally for higher boost levels.
Originally posted by Paul R
Nope, it's when the first turbo starts to boost, I can feel some power, then hesitation for a second, then 0.6 bar. Second turbo kicks in normally and quickly.
Paul.
Sounds like it's gonna be a vac hose to do with the sequential system probably one that's involved in the prespool of #2 turbo as it only comes in once #1 has got going a bit.
-Ian
Originally posted by Ian C
Sounds like it's gonna be a vac hose to do with the sequential system probably one that's involved in the prespool of #2 turbo as it only comes in once #1 has got going a bit.
-Ian
Has anyone got a pic of this hose or hoses?
I dont know anything about the sequential system, so need help!
Can you tell me what to check?
Cheers,
Paul.
http://www.mkivsupra.net/resources/turbopipes/left.html
It takes a lot of holding your head and going "hnnnng" to understand the vacuum map and everything, I'll warn you now :) it also helps to be looking in the engine bay as you do it.
From very recent experience, check *every* hose :D
-Ian
Dragonball
11-02-04, 21:00
Originally posted by Paul R
Oh bugger, your making me worried now :confused:
Just chill - it's something very simple and nothing to worry about
Good grief guys stop winding him up!
Check ALL the hoses - it wont take long!
:thumbs:
Originally posted by Matt Harwood
Sorry to sound all doom and gloom, but just get yourself some cheapish NGK BKR7E's. They're well proven plugs and not too expensive to find out it's not the plugs...
A gap of 1.1 should be fine on stock boost, 0.8 is generally for higher boost levels.
Will it be OK to run the car on these plugs for a month or two until I can get a decent set and a service?
They are only 11 pounds a set. Is that right? sounds cheap to me!
Paul.
I paid £1.76 each for these plugs from Partco.
As far as I can remember they're ok for upto about 6,000 miles but am not sure for definite.
Dan
Matt Harwood
12-02-04, 16:36
I've done 10,000 miles on a set before, and I only changed them because I wanted to, not because they were breaking down...
Originally posted by Matt Harwood
I've done 10,000 miles on a set before, and I only changed them because I wanted to, not because they were breaking down...
Cool.
Was that on stock boost or higher?
Paul.
I'm much happier tonight!
I changed the plugs for the cheap NGK plugs that Matt suggested and guess what??
It works!! Spool up is quick and clean, no miss fires and there appears to be about twice as much power as there was before!!! yay, I can spin the wheels in 4th gear again :eek: :eek:
Paul E - I have checked the hoses and I've found a leak from one.
It's the hardpipe from the turbo to the first join. It looks like someone has tried to get the rubber seal in between this pipe and the next off with a screwdriver.
This has dented the pipe on the end and the rubber seal isnt long enough to cover it. I can tell this because a bit of fresh oild has come out since I wiped it clean.
Can you get me another pipe?
Cheers,
Paul.
Dragonball
12-02-04, 23:40
There ya go - yes no worries on pipes but not a bloody clue which one you are on about!:)
Give me the length and internal diameter and I'll send you a piece
Originally posted by Paul E
There ya go - yes no worries on pipes but not a bloody clue which one you are on about!:)
Give me the length and internal diameter and I'll send you a piece
Hi,
it's a pipe with two curves in it:
1, is the pipe.
2, is where it is leaking.
The pipe is about 13.5" long and 2.5" in diameter.
http://www.supra-shop.co.uk/turbo/pipe2.jpg
Matt Harwood
13-02-04, 09:56
Cool, glad it's all working now Paul... And I'm glad I was wrong! :innocent:
Originally posted by Matt Harwood
Cool, glad it's all working now Paul... And I'm glad I was wrong! :innocent:
Thanks Matt.
It's made a hell of a difference!
I tought the clutch had gone to start with ! lol...
The wheels were spinning in 1st, 2nd, 3rd and 4th!! upto about 80mph. I got scared after that and calmed down!
Will these plugs (NGK BKR7E's) be OK for running 1.2bar too?
Cheers,
Paul.
Matt Harwood
13-02-04, 10:51
Yes, but the gap should be reduced to 0.8, (if it hasn't already).
Originally posted by Matt Harwood
Yes, but the gap should be reduced to 0.8, (if it hasn't already).
OK, cheers.
I set the gap on all the plugs to 1.1mm before I put them in.
Is there a way to test the HKS iridium plugs that I took out?? They dont look too bad to me.
Paul.
Dragonball
13-02-04, 20:53
Paul - you will just need to unscrew the existing silicon hose clamp - reposition slightly and re-clamp
It should take a few minutes and all will be well - the small leak really wont make much difference at all - so dont worry
:thumbs:
Originally posted by Paul E
Paul - you will just need to unscrew the existing silicon hose clamp - reposition slightly and re-clamp
It should take a few minutes and all will be well - the small leak really wont make much difference at all - so dont worry
:thumbs:
Paul,
I tried that already. The silicone hose isnt long enough. I've checked again today and oil has pissed out in the engine bay again!
Paul.
Dragonball
14-02-04, 09:14
Originally posted by Paul R
Paul,
I tried that already. The silicone hose isnt long enough. I've checked again today and oil has pissed out in the engine bay again!
Paul.
It's only residual oil - they obviously haven't been taken off for a while
Take them off completely and wipe the one inside and out and replace carefully - but firmly (Oo-er missus!)
I dont have 2.5" hose in stock at mo - give one of your local pipe guys a call and check - you need internal diameter 2.5" - prob 2x10cms
Otherwise it's a wait till some comes in -
:( :thumbs:
Hi,
Well it looks like this thread has a happy ending!!
I changed the silicone connecting hoses between the intercooler hard pipes this morning. what can I say - big *grin*. I took the car out and there is a big power increase!
I was only hitting 0.8 bar before, now it's hitting 0.9 bar! The turbos spool quicker and the dump valve has a louder whoosh!
So thanks for all the info/advice guys!
Paul.
Dragonball
15-02-04, 16:47
Thank the Lord for that!
Now bugger off and enjoy ya motor!:p
glad to hear that matey! :D
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