Does that pipe fit onto a metal pipe that runs to the other side of the inlet manifold?
If so does it go to a sensor next to the diagnosis port or does it run towards the fuel rail? (fuel pressure regulator)
Fuel / Air problem (stressed!)
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Many subjects will have been discussed before. Please try the search function before starting a new thread.
Check in the Know Your 2 as the information you need may already be there.
Important ! - Please make your topic title as descriptive as possible . titles with just "help" generally dont get as many answers as a title that points to the problem
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RedRoy
Topic author - Posts: 46
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Re: Fuel / Air problem (stressed!)
Surprisingly it goes down under the inlet manifold then back up and just under the inlet manifold its attached to this:
Bear in mind, ive had this induction kit 7 years with no problems so i dont think its how its connected but maybe leaking / blocked perhaps? It's on a N/A Rev 4 if that gives you any clues to set up.
Bear in mind, ive had this induction kit 7 years with no problems so i dont think its how its connected but maybe leaking / blocked perhaps? It's on a N/A Rev 4 if that gives you any clues to set up.
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littlemisstubby
Re: Fuel / Air problem (stressed!)
Yeah that's the fuel pressure regulator.
The pipe goes underneath the inlet mani to the VSV solenoid then up to the fpr. I'd bypass the vsv for now by running the pipe straight from the inlet manifold to the fpr, or 'T' into the vacuum sensor piping. (next to the diagnosis port)
The pipe goes underneath the inlet mani to the VSV solenoid then up to the fpr. I'd bypass the vsv for now by running the pipe straight from the inlet manifold to the fpr, or 'T' into the vacuum sensor piping. (next to the diagnosis port)
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Chris_D
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Re: Fuel / Air problem (stressed!)
That's what I'd expect on an engine that age, but in the first post he described a split pipe after the airflow sensor.littlemisstubby wrote:No afm but it has a vacuum (map) sensor.Chris_D wrote:I'm not familiar with the setup of this particular engine, but if it has an airflow meter my gut feeling is that this is at fault
On a MAP sensor engine, going weak would imply an increased volumetric efficiency (more air for same pressure) which should give more power, not less in this area. I would conclude that cam timing wouldn't be the issue.
Assuming the rich at bottom, weak at top is true, IMO it is most likely to be an error in reading pressure (map sensor) or an error in fuel pressure (fuel pressure regulator / pump)
I would check for leaks or blockages in the feed to the MAP sensor (there is normally a damper orifice which potentially can block). Also follow suggestions on the vac. feed to the FPR.
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RedRoy
Topic author - Posts: 46
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Re: Fuel / Air problem (stressed!)
Apologies i know and i appreciate your help, but could you bear in mind im a complete thicko and i don't understand the parts you are advising to check. Could you describe the feed for the MAF sensor as google isnt really pulling any pictures up i can relate to my engine.Chris_D wrote:That's what I'd expect on an engine that age, but in the first post he described a split pipe after the airflow sensor.littlemisstubby wrote:No afm but it has a vacuum (map) sensor.Chris_D wrote:I'm not familiar with the setup of this particular engine, but if it has an airflow meter my gut feeling is that this is at fault
On a MAP sensor engine, going weak would imply an increased volumetric efficiency (more air for same pressure) which should give more power, not less in this area. I would conclude that cam timing wouldn't be the issue.
Assuming the rich at bottom, weak at top is true, IMO it is most likely to be an error in reading pressure (map sensor) or an error in fuel pressure (fuel pressure regulator / pump)
I would check for leaks or blockages in the feed to the MAP sensor (there is normally a damper orifice which potentially can block). Also follow suggestions on the vac. feed to the FPR.
Again, thank you for trying to help and im trying my best to learn as people advise me.
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rhon
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Re: Fuel / Air problem (stressed!)
Hiya Roy I'm still here, still doing the monthly meets, in fact, there's one on Wednesday. We're still doing the Wales Runs too.RedRoy wrote:
I wish i was young but i'm a teenage 43 year old
Wow, i bet Howlin_Mad doesnt remember me here as its been a couple of years since i used to post regularly , must go and see Rhon at the West Mids meet as i loved her and thought she was a legend. Maybe even VC is still around here ?
at my sick MR2, first ever issue ive had in 8 years of ownership.
Hope you and you lad are keeping well :-)
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RedRoy
Topic author - Posts: 46
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Re: Fuel / Air problem (stressed!)
Rhon!!!
So good to hear from you again! Thanks for the PM, i'll give you a text / call soon. Doubt i can make this Weds as cars poorly but i'll certainly see about the August meet.
The lads now 6"3 and dwarfs his ageing Dad!
So good to hear from you again! Thanks for the PM, i'll give you a text / call soon. Doubt i can make this Weds as cars poorly but i'll certainly see about the August meet.
The lads now 6"3 and dwarfs his ageing Dad!
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rhon
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Re: Fuel / Air problem (stressed!)
My two are both over 6ft too and dwarf their ageing mom lol
red arrow16a (XVIa)& 16b (XVIb) replacement gear & handbrake gaiters http://www.mr2oc.co.uk/forums/265/149068.html Refurb gearknobs and steering wheels W Mids Regional Rep
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RedRoy
Topic author - Posts: 46
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Re: Fuel / Air problem (stressed!)
@Rhon: Lovely to hear from you, will catch up soon x
Well i've bitten the bullet and about to throw more money at Toyota as ive run out of things to check or do now to resolve it. Booked in for Friday to see if the cambelt has missed a cog like they think it could be.
Wouldn't surprise me if they say the cambelt needs replacing although it's not due by time since last new one and still got 20,000 before due replacing on mileage.
Tried booking it in with an MR2 specialist 2 hours away, but they dont work Saturdays (only day i can have off) and they wouldn't even offer me any suggestions what could be wrong to the point i thought i may as well just go local, as go to them and be in the same position i'm in now as they didn't fill me with inspiration and just replied "could be anything".
8 years of blissful ownership with no mechanical problems whats so ever but now i realise the perils of having a car so old, your ****** when it goes wrong engine wise
Well i've bitten the bullet and about to throw more money at Toyota as ive run out of things to check or do now to resolve it. Booked in for Friday to see if the cambelt has missed a cog like they think it could be.
Wouldn't surprise me if they say the cambelt needs replacing although it's not due by time since last new one and still got 20,000 before due replacing on mileage.
Tried booking it in with an MR2 specialist 2 hours away, but they dont work Saturdays (only day i can have off) and they wouldn't even offer me any suggestions what could be wrong to the point i thought i may as well just go local, as go to them and be in the same position i'm in now as they didn't fill me with inspiration and just replied "could be anything".
8 years of blissful ownership with no mechanical problems whats so ever but now i realise the perils of having a car so old, your ****** when it goes wrong engine wise
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_Al_
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Re: Fuel / Air problem (stressed!)
You're going to pay Toyota £££ without even trying the multimeter!?!?! 
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RedRoy
Topic author - Posts: 46
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Re: Fuel / Air problem (stressed!)
Unless im reading the post completely wrong then the physical checks on the ACIS worked as they should do and the arm went into the open and closed position which meant the solenoid was working ok? I'll read posts again in case i've missed something.
I tried the rags in exhaust too and yup she laboured and wanted to die after a short time.
I tried the rags in exhaust too and yup she laboured and wanted to die after a short time.
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_Al_
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Re: Fuel / Air problem (stressed!)
RedRoy wrote:Unless im reading the post completely wrong then the physical checks on the ACIS worked as they should do and the arm went into the open and closed position which meant the solenoid was working ok? I'll read posts again in case i've missed something.
I tried the rags in exhaust too and yup she laboured and wanted to die after a short time.
Yep, those were the "while you're waiting for the multimeter" tests.
To be honest mate any competent garage can change the belt on an MR2. I've Dow it twice myself and I'm definitely not a competent mechanic. There's no call to go paying Toyota prices.
I strongly recommend you cancel it if at all possible.
Red 92 turbo tintop JDM
White 95 turbo tintop JDM (Nov '11 Show&Shine Winner)
Red 97 NA tintop JDM
Blue 95 tubby tintop JDM
Mica 96 NA T-bar UK
Red 96 UK NA
Red 97 NA tintop JDM
White 95 turbo tintop JDM (Nov '11 Show&Shine Winner)
Red 97 NA tintop JDM
Blue 95 tubby tintop JDM
Mica 96 NA T-bar UK
Red 96 UK NA
Red 97 NA tintop JDM
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rhon
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Re: Fuel / Air problem (stressed!)
Have you tried Nathan at mrtwos in Willenhall?
red arrow16a (XVIa)& 16b (XVIb) replacement gear & handbrake gaiters http://www.mr2oc.co.uk/forums/265/149068.html Refurb gearknobs and steering wheels W Mids Regional Rep
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littlemisstubby
Re: Fuel / Air problem (stressed!)
There are other things to try yet Roy so I'd hang on a bit. Taking it to Toyota would be a last resort if it was my car.
Even if the ACIS isn't working as it should be it wont be flat throughout the rev range. It will either be flat at the top end or at the bottom end. Even if the 'kick' isn't there it doesn't mean it's not working properly. It's just maybe something else holding it back. (ignition components normally)
What does the car idle at now when it's warmed up? Do the revs take quite a few seconds to settle down? That would tell me a lot about a possible cause.
Even if the ACIS isn't working as it should be it wont be flat throughout the rev range. It will either be flat at the top end or at the bottom end. Even if the 'kick' isn't there it doesn't mean it's not working properly. It's just maybe something else holding it back. (ignition components normally)
What does the car idle at now when it's warmed up? Do the revs take quite a few seconds to settle down? That would tell me a lot about a possible cause.
