spultering, random help

[Lucutus]

Hi,

7mGTE -

Just had it all fixed as some who follow my crap threads know - yet it dont go right at all.

Now i have noticed another problem . When driving the car the engine will /cut/not fire/splutter for a second like theres no spark or fuel or something. Only happens for a split second and very very randomly - once each 1 hour trip.. i can live with it when it does it at low revs - but when it does it when boosting to overtake - its dangerous and freaky as the turbo get cut for a second. Any ideas ?

And for the love of "whatever" what do you guys pull in 3rd gear when redlining - say 6*rpm - just so i can get an idea that my car isnt as slow as i think it is.

P.S. dump Valve is in the right place and loud as now. not that im liking that much - is there any clear way of knowing if you DV is wanked? maybe this is the problem.

Thanks for any help.

L .

[Dino]

P.S. dump Valve is in the right place and loud as now. not that im liking that much - is there any clear way of knowing if you DV is wanked? maybe this is the problem.

Thanks for any help.

L .


is it a stock dv? if so loud is not the way it's best to describe it, silent would be better, well when compared to others on the market.

[Lofty]

When it does it while boosting does the check engine light come on briefly?

[Lucutus]

When it does it while boosting does the check engine light come on briefly?


good train of thought loft' - but its not the boost controler - no light .

Its not a stock DV. dual piston one.

the "cut outs" happen random. whether at idle or mac 10 . when it happens at idle or low revs the engine turns off.

Taking it back to the muppet car guys, really dont want too but spent so much wonga with them i feel i have too. - but if i have some idea of what it is at least i can get them to check it.

L

[Lofty]

Using an atmospheric DV can cause the engine to stumble/splutter when lifting off the throttle, but not when the car is boosting. Is the car cutting out whilst boosting or just between shifts?

What other symptoms are there? Any lights on the dash come on? Have you checked your codes?

The other things to check as well might be:
1. Plugs/leads. Are the leads in good condition?
2. Make sure that all electrical connectors are plugged in tight.
3. Check the battery terminals.
4. Look for bad earths particularly near the ECU.
5. Don't rule out the possibility of 2 problems, 1 at idle and 1 whilst boosting.

Has this only happened since you got the DV and turbo fitted?

[Bondango]

Even Though the Dual Piston DV dos'nt leak on Our cars, it still causes an Over rich condition after boost's, Every now and again i experience this even with my HKS dumpvalve. But usually when the car is cold, so its running quite rich to start with.

[Lucutus]

Even Though the Dual Piston DV dos'nt leak on Our cars, it still causes an Over rich condition after boost's, Every now and again i experience this even with my HKS dumpvalve. But usually when the car is cold, so its running quite rich to start with.

I think its more of an engine issue, Fuel no spark bad HT leads maybe - happens more when its hot than cold.

a Bleed vavle / MBC whats the difference? my BV is very crude. looking for a better one.
This any good?
1/
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?
ViewItem&category=32094&item=7916694226&rd=1&ssPageName=WDVW
2/
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category=32094&item=7916137722&rd=1&ssPageName=WDVW

mkiii's have 8mm pipe from wastegate to actuator right?

Had to put the BV on to make the car go right,,, and thats not right is it.

took it off the other day and the car was very slow. so im worried that my engine/turbo aint been put back together correctly.

HKS sequential bloww off valve Supra mkIII / 7M-GTE worth getting?

L

[Lucutus]

Using an atmospheric DV can cause the engine to stumble/splutter when lifting off the throttle, but not when the car is boosting. Is the car cutting out whilst boosting or just between shifts?

What other symptoms are there? Any lights on the dash come on? Have you checked your codes?

The other things to check as well might be:
1. Plugs/leads. Are the leads in good condition?
2. Make sure that all electrical connectors are plugged in tight.
3. Check the battery terminals.
4. Look for bad earths particularly near the ECU.
5. Don't rule out the possibility of 2 problems, 1 at idle and 1 whilst boosting.

Has this only happened since you got the DV and turbo fitted?

No dash lights. What codes?

Happens all the time - since the car chaps put a new cam belt/ aux cog rocker cover seals and manifold gasket back on the car. with old turbo still on it and no dump vavle.


cam belt fell off due to the aux cog snapping, i was lucky that no vavles were damaged. belt went back on and the car worked.. or was i lucky....?
cuz it dont go nothing like it used too. getting vexed about this sodding car now.

will check all your above points.

[imoyes]

This any good?
1/
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category=32094&item=7916694226&rd=1&ssPageName=WDVW


I bought one of these and I'm not very happy with it. I found it difficult to set and found that, when you accelerate, there's a sphincter puckering boost spike.

Lofty's looking at it to see if he can figure out how to stop the spike, and set it accurately. Right now, you'd be welcome to it for £10 inc. P&P. PM me if you're interested.

[Lucutus]

I bought one of these and I'm not very happy with it. I found it difficult to set and found that, when you accelerate, there's a sphincter puckering boost spike.

Lofty's looking at it to see if he can figure out how to stop the spike, and set it accurately. Right now, you'd be welcome to it for £10 inc. P&P. PM me if you're interested.


Ok what about this one - says its not a BV or a ball spring job.

http://cgi.ebay.co.uk/ws/eBayISAPI....ssPageName=WDVW

L.

[Tony Donovan]

Linky no workee... :cheeky:

[Lofty]

What codes?
Diagnostic codes. (http://www.cygnusx1.net/supra/library/TSRM/fi/FI_023.html) First place to look just in case it points you in the right direction.

Whenever I come across an intermittant problem I always try and simplify things or put things back to how they should be. This helps to eliminate some stuff straight away. If you believe that the problem has only occured since the recent work was carried out then start checking backwards to see if anything is loose, etc.

[Lucutus]

Linky no workee... :cheeky:
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category=32094&item=7916137722&rd=1&ssPageName=WDVW

try now. :rant: dam cut and paste,

[Tony Donovan]

Fine now. Ta.

[Lofty]

Never tried one. Let us know how you get on. You will be wanting 6mm connectors. If the performance is as good as the add says then it should work well.

[Tony Donovan]

Is it possible your valves - or some of them,anyway - got a tad dinged after all?

[Lucutus]

Is it possible your valves - or some of them,anyway - got a tad dinged after all?


mmm i dont know. The engine sounds lovely on tickover and when u rev it from standing. no smoke no blue no hunting on idle.

If some of the valves were shagged im sure the engine wouldnt behave this way.

[Bryank]

mmm i dont know. The engine sounds lovely on tickover and when u rev it from standing. no smoke no blue no hunting on idle.

If some of the valves were shagged im sure the engine wouldnt behave this way.
Dinked valves cause a misfire on the cylinder involved, as there is a lack of compression & seal due the valve stem being bent, which would certainly cause lousy idling if only a little bent, or in fact likely the engine wouldn't even run.. if a valve is sticking in a guide, then it would misbehave, (ie lack of power sometimes, or an occasional misfire) but wouldn't cut out, as only a single cylinder would likely only be effected, and again i would say it would not idle well at all.. (I've trashed valves in various engines :crybaby: )

Does the exhaust note sound harsher than it was before? (hard to explain, but leaky exhaust valves [usual ones to die] give a harsher exhaust note as they are allowing gas past during combustion)

Has the cam timing been checked?

Possibly get a compression check done, which would confirm or deny if a valve is stuffed.

However, if it's running well apart from the cut out, my 2p is for an electrical or fuel fault somewhere.. Follow Lofty's advice and check the codes etc... a little concerned that it's only been like it since the garage 'fixed' it though!

[nigel w]

Which gasket did they do?, did they go anywhere near the INJECTORS and the FUEL RAIL?

[Lucutus]

Which gasket did they do?, did they go anywhere near the INJECTORS and the FUEL RAIL?


did the rocker cover seals. and the exhaust mainifold gasket.

They also left out the gasket between the turbo elbow and turbo which im miffed about. Its the only thing i can think is making the turbo not pull right.

Taking it back to them tomorrow, but have a nasty feeling they aint going to do **** about it. god dam the UK no one in business gives a monkies about customer service and pride in their work........... :rant:

why do all the half good supe fixers live miles away.

[black 86 supra]

why do all the half good supe fixers live miles away.

time to move then mate :) cambridge would be a good location :yes:

[Dillinger]

yeah, loads of car companies down there... lots of good racing engineers etc.

shame about the southerners though.. :cheeky: :duck:

[Lucutus]

yeah, loads of car companies down there... lots of good racing engineers etc.

shame about the southerners though.. :cheeky: :duck:


Suprised you have managed to keep your supe so long up there....
Do you take all your wheels off before you go to bed? or just park it in the police station?

:happy3:

[Nodalmighty]

Supra's run rich and I mean really rich at WOT like 11.0:1 AFR and the more boost you stick up their **** hole the richer they go (10.0:1 AFR is not uncommon @ 1 bar). If the CTS is shagged in such a way that it reads cold all the time then the ECU won't flag an error this will cause a mega rich HOT condition. I spent 12 months chasing your exact problem (It didn't like the wet either). After I fitted an Apexi SAFC I started monitoring the KV frequency I found that every now and then for no reason it would just throw out a spurious frquency and totally confuse the ECU (usually on overrun when it would throw out 600 hz when the actual flow was about 10 hz). The Karman Vortex is a total peice of **** that should never have seen the light of day, unfortunately they did and we have them (well some of us ;-) ) and Toyota will relieve you of £700 if you want a new one. Second hand ones are about £70 but you take the risk of buying another duffer and thinking "it wasn't that then". Get someone with a working Supra and swap bits over until it behaves then buy the bit that cured it.

Nod.

[Adam W]

Also try checking the wiring around the CPS, the coil pack, and the ignitor. I had a similar problem once and it was a bad connection in the ignition side of things.

[Lucutus]

Ok have taken off the Dump valve as it leaked a tiny bit... Its yet to cut out on me - but i aint holding my breath.

Checked all of the points rasied in the thread and all checks out ok . I am hoping its the DV.

Which means i need a new one.

So any idea? wich is best - and ok for a mkiii/.

L .

[Nodalmighty]

Ok have taken off the Dump valve as it leaked a tiny bit... Its yet to cut out on me - but i aint holding my breath.

Checked all of the points rasied in the thread and all checks out ok . I am hoping its the DV.

Which means i need a new one.

So any idea? wich is best - and ok for a mkiii/.

L .

Bailey Motorsprot make a piston recirculating version complete with a fittting kit and in various colours. I have one on mine and it goes tish! and goes it's job. Some like to make their engines play tunes when the throttle is shut and this is where something like a HKS SSQV comes in (as does about £350).

Nod.