FC Vert running issue (NOT TPS)
07-08-16, 07:42 PM
#1
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FC Vert running issue (NOT TPS)
Hi all,
I'm having issues with my 89 TII vert, none of the mechanics and specialists around here know what it is.
When the car gets up to temperature, whenever I try to use the turbo it bogs down, it has huge hesitation and loss of power, the revs drop whilst maintaining the accelerator position, burbling and popping.
The only way to keep it going is to come right off the accelerator and then only use it slightly (as in 1mm of pressure) to make sure the turbo doesn't kick in.
It's not the TPS, I've replaced the spark plugs, leads, trailing coil packs, fuel filter and the TPS unit.
On warm up, it's absolutely fine, idles nicely, when it's up to temperature it spools, it powers, it drives beautifully. Then something just flips and it seems like it goes into limp mode without rhyme or reason except it's up to operating temperature.
Any ideas? Because I'm right on the edge of quitting on it.
Thanks in advance,
I'm having issues with my 89 TII vert, none of the mechanics and specialists around here know what it is.
When the car gets up to temperature, whenever I try to use the turbo it bogs down, it has huge hesitation and loss of power, the revs drop whilst maintaining the accelerator position, burbling and popping.
The only way to keep it going is to come right off the accelerator and then only use it slightly (as in 1mm of pressure) to make sure the turbo doesn't kick in.
It's not the TPS, I've replaced the spark plugs, leads, trailing coil packs, fuel filter and the TPS unit.
On warm up, it's absolutely fine, idles nicely, when it's up to temperature it spools, it powers, it drives beautifully. Then something just flips and it seems like it goes into limp mode without rhyme or reason except it's up to operating temperature.
Any ideas? Because I'm right on the edge of quitting on it.
Thanks in advance,
Last edited by Skifledanabit; 07-08-16 at 07:50 PM.
07-08-16, 09:00 PM
#3
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It's something I need to do tomorrow. I just need to find an LED. Thing is, the CEL isn't on so I doubt any codes will be thrown up. I might just swap the OMP over anyway to be sure.
07-08-16, 09:11 PM
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if it's in the idiot cluster on the dash then yes, they're all lighting up when ignition is on. Although, you could be right. It may not light up for some weird and wonderful reason. Much the same as why the clock never holds the time and resets.
07-09-16, 12:07 AM
#6
Actually, not comparable at all.
The warning lamps are pretty much just that, lamps.
About the only failure point is going to be the bulb itself, unlike the clock, which has a nice prehistoric circuit board and electronics. I've been through several warning clusters chasing the mythical "functional clock" but have never seen a problem with the warning light section.
You can kill two birds with one stone by attempting to read any codes...there's no LED required because the CEL should tell you. If the light isn't working, replace bulb and try again.
Is this condition new and out of the blue or has any recent work preceded the problem?
What diagnostics/info have you gotten from the local techs?
For instance, has anyone checked fuel pressure during the failure mode incidents?
Maybe the fuel pressure regulator?
As the engine warms up the ECU is throwing down extra fuel and you are (presumably) refraining from load/boost, so a problem with fuel delivery could be masked until the engine tries to run normally.
Just a guess.
The warning lamps are pretty much just that, lamps.
About the only failure point is going to be the bulb itself, unlike the clock, which has a nice prehistoric circuit board and electronics. I've been through several warning clusters chasing the mythical "functional clock" but have never seen a problem with the warning light section.
You can kill two birds with one stone by attempting to read any codes...there's no LED required because the CEL should tell you. If the light isn't working, replace bulb and try again.
Is this condition new and out of the blue or has any recent work preceded the problem?
What diagnostics/info have you gotten from the local techs?
For instance, has anyone checked fuel pressure during the failure mode incidents?
Maybe the fuel pressure regulator?
As the engine warms up the ECU is throwing down extra fuel and you are (presumably) refraining from load/boost, so a problem with fuel delivery could be masked until the engine tries to run normally.
Just a guess.
07-09-16, 04:46 AM
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Actually, not comparable at all.
The warning lamps are pretty much just that, lamps.
About the only failure point is going to be the bulb itself, unlike the clock, which has a nice prehistoric circuit board and electronics. I've been through several warning clusters chasing the mythical "functional clock" but have never seen a problem with the warning light section.
You can kill two birds with one stone by attempting to read any codes...there's no LED required because the CEL should tell you. If the light isn't working, replace bulb and try again.
Is this condition new and out of the blue or has any recent work preceded the problem?
What diagnostics/info have you gotten from the local techs?
For instance, has anyone checked fuel pressure during the failure mode incidents?
Maybe the fuel pressure regulator?
As the engine warms up the ECU is throwing down extra fuel and you are (presumably) refraining from load/boost, so a problem with fuel delivery could be masked until the engine tries to run normally.
Just a guess.
The warning lamps are pretty much just that, lamps.
About the only failure point is going to be the bulb itself, unlike the clock, which has a nice prehistoric circuit board and electronics. I've been through several warning clusters chasing the mythical "functional clock" but have never seen a problem with the warning light section.
You can kill two birds with one stone by attempting to read any codes...there's no LED required because the CEL should tell you. If the light isn't working, replace bulb and try again.
Is this condition new and out of the blue or has any recent work preceded the problem?
What diagnostics/info have you gotten from the local techs?
For instance, has anyone checked fuel pressure during the failure mode incidents?
Maybe the fuel pressure regulator?
As the engine warms up the ECU is throwing down extra fuel and you are (presumably) refraining from load/boost, so a problem with fuel delivery could be masked until the engine tries to run normally.
Just a guess.
Local tech are as stumped as I am. My nearest rotary specialist mainly deals with RX8s and FCs are a work in progress for his knowledge and skills, even the boss of the UK rotary forum isn't overly sure.
Because he's busy with paying customers cars, I'm having to do the diagnostics and repairs myself, so no, the fuel pressure hasn't been checked under load. But it's still throwing fuel through because I can smell it whilst it's playing up, which leads me to believe it's limp mode.
I'm waiting until it gets up to temperature before putting it under load or boost yes but for some reason, the problems still don't occur until I'm out there. First time it happened I made it a few miles away then it started, after that, a couple of miles less, it's got down to a couple hundred meters yesterday before kicking in yesterday.
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07-11-16, 12:36 PM
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Ahhh, thanks guys, it was in fact the OMP! I took it off and found some congealed gloopy instant gasket type stuff covering the feed hole in the face in contact with the block. swapped it out for a nice clean(er) unit and it started working beautifully!
Drove it straight to a car show after I fixed it.
Then the clutch slave cylinder failed on me... An old car is never truly running without issue lol.
Drove it straight to a car show after I fixed it.
Then the clutch slave cylinder failed on me... An old car is never truly running without issue lol.
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