Matsumoto wrote:What was the cure for this? My Rev 2 is doing the exact same.
Holy thread revival!! Have you checked for fault codes? Do that first
Major boost cut at higher revs
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Re: Major boost cut at higher revs
Holy thread revival!! Have you checked for fault codes? Do that first
Re: Major boost cut at higher revs
Haha 
Rev 2 Mr2
Yea I've got no codes and no light. (But light is working)
De cat
HKS FCD
New MBC(to eliminate this as the problem)
New fuel filter, plugs, oil, oil filter, dizzy, rotar arm,
Dump valve
I replace the turbo only a few weeks ago(problem was there before)
Head gasket was replaced last year
Boost gauge
All was running fine until I overtook up hill and it seemed to have a little bit less power. The next day this problem occurred and has since.
It's only when I try and get full 1.0 bar boost, it gets to 0.7-0.8 ok then sounds like it starts misfiring and starts holding back with strong smell of fuel wafting past afterwards.....I've can't see any cracked vacuum hoses either 
When I took the old MBC off I could drive it perfectly fine flat out but of course it was only set to o.6 bar standard.
Rev 2 Mr2
Yea I've got no codes and no light.
(But light is working) De cat
HKS FCD
New MBC
(to eliminate this as the problem)New fuel filter, plugs, oil, oil filter, dizzy, rotar arm,
Dump valve
I replace the turbo only a few weeks ago
(problem was there before)Head gasket was replaced last year
Boost gauge
All was running fine until I overtook up hill and it seemed to have a little bit less power.
The next day this problem occurred and has since. It's only when I try and get full 1.0 bar boost, it gets to 0.7-0.8 ok then sounds like it starts misfiring and starts holding back with strong smell of fuel wafting past afterwards.
....I've can't see any cracked vacuum hoses either When I took the old MBC off I could drive it perfectly fine flat out but of course it was only set to o.6 bar standard.
Re: Major boost cut at higher revs
So I'm thinking maybe
Ignition timing
Vacuum leak(I might not be able to visually see a crack)
HT leads
Coil/ igniter?
Ignition timing
Vacuum leak
(I might not be able to visually see a crack)HT leads
Coil/ igniter?
Re: Major boost cut at higher revs
Leads. Get genuine Toyota.
Get genuine Toyota.Re: Major boost cut at higher revs
Al-sw20 wrote:Leads.
Yea you think leads? How much do you think I'm looking at for Toyota ones? And why not after market? Are they really that bad?
Thanks
Re: Major boost cut at higher revs
Aftermarket don't fit properly.
Had a friend that fitted aftermarket Eagle performance leads to his MR2. Had a misfire on boost over 4000rpm. I swapped in my spare set of 15 year old stock leads. Misfire gone.
Had a friend that fitted aftermarket Eagle performance leads to his MR2.
Had a misfire on boost over 4000rpm. I swapped in my spare set of 15 year old stock leads. Misfire gone.Re: Major boost cut at higher revs
I just checked my leads and there Yazaki dated 2007... So getting on 10 years old now...ill phone around for genuine parts price
.. So getting on 10 years old now...ill phone around for genuine parts priceRe: Major boost cut at higher revs
Yea 120 quid compared with 160 odd from Toyota
but still a lot. Apprantly you can test the leads? But don't know what the values should be or at what points to put the pins?I just don't want to shell out for leads untill I'm sure.
... 😟Re: Major boost cut at higher revs
Update
Well I got the multimeter out and the values are
HT LEAD
1 10.27
2 8.32
3 7.95
4 5.30
Anything under 25 is good apparently so it seems HT leads are out.
I have on order new vacuum hoses...we shall see
Well I got the multimeter out and the values are
HT LEAD
1 10.27
2 8.32
3 7.95
4 5.30
Anything under 25 is good apparently so it seems HT leads are out.
I have on order new vacuum hoses.
..we shall see