Home and Auto Car Help? - Page 2

MagicHef · 08-25-2017, 10:37 AM

I know there are some knowledgeable car guys on here, and maybe someone can help. My 2001 MR2 Spyder has been running really rough, and I've been running in circles trying to fix it. The previous owner installed an aftermarket turbo with custom headers and exhaust, K&N intake, piggyback ECU, anti-knock system, and higher flow injectors. I've had it for 5 years and it has been working well until recently, so I don't know that the issues are directly related to any of the modifications.

So far I have replaced the fuel pump, fuel filter, fuel pressure regulator, fuel injectors, coils, spark plugs, camshaft sensor, crankshaft sensor, MAF sensor, and O2 sensors.

It was simply running poorly (sounded like it had a dead cylinder) and not throwing codes, but after replacing the camshaft sensor it started giving codes again. Now it gives codes for misfires on all 4 cylinders, plus random misfires, and says the system is too lean.

I am about out of ideas and hoping that I'm overlooking something obvious.

cooper barrett · 08-25-2017, 11:17 AM

Did you do a compression test

A trick i used to use to test the Cat was to remove the O-ring from compression tester and screw it into the cat. I think that normal back pressure was about 10-12psi.

MagicHef · 08-25-2017, 11:26 AM

Quote:

Originally Posted by cooper barrett

Did you do a compression test

A trick i used to use to test the Cat was to remove the O-ring from compression tester and screw it into the cat. I think that normal back pressure was about 10-12psi.

I did one a few months ago that came back normal. I was thinking of doing another, but decided against it due to the fact that the issue is affecting all of the cylinders.

**Buehler445** · 08-25-2017, 11:37 AM

I don't know anything about the specific model or the mods but it might be a timing issue.

MagicHef · 08-25-2017, 11:48 AM

Quote:

Originally Posted by Buehler445

I don't know anything about the specific model or the mods but it might be a timing issue.

I thought of that too, but it has a timing chain rather than belt. I'm not entirely sure if that eliminates the possibility of an issue or not.

**Buehler445** · 08-25-2017, 11:52 AM

Quote:

Originally Posted by MagicHef

I thought of that too, but it has a timing chain rather than belt. I'm not entirely sure if that eliminates the possibility of an issue or not.

They can go bad too. Not sure I've seen one go bad that hasn't broke and tore the hell out of everything while it gets wound up.

Jason is a better guy to ask than me.

If it's getting every cylinder it could be timing or a controller problem IMO. But I run Deere shit so I may be abnormally predisposed to controller problems.

Nixhex · 08-25-2017, 12:20 PM

I am getting a P0102 code on my 02 Monte Carlo. The MAF sensor has been replaced and I have used a multimeter to confirm power to the MAF Sensor connection wire. What else could the problem be?

TLO · 08-25-2017, 12:35 PM

Sounds like a vacuum leak somewhere.

EDIT: sounds like others have given that suggestion as well. Shouldn't be too difficult to do yourself.

**notorious** · 08-25-2017, 12:42 PM

Quote:

Originally Posted by Buehler445

If it's getting every cylinder it could be timing or a controller problem IMO. But I run Deere shit so I may be abnormally predisposed to controller problems.

Brand new equipment is covered by the Deere warranty. I know you don't run anything older than a couple years.

**Buehler445** · 08-25-2017, 12:50 PM

Quote:

Originally Posted by notorious

Brand new equipment is covered by the Deere warranty. I know you don't run anything older than a couple years.

Riiiiiiiiiiiiiiiiiiiight

cooper barrett · 08-25-2017, 12:55 PM

Quote:

Originally Posted by MagicHef

I did one a few months ago that came back normal. I was thinking of doing another, but decided against it due to the fact that the issue is affecting all of the cylinders.

Did you do a wet dry compression test Leak down if anything looks iffy..

Since you are thinking T Chain:

You can check chain by pulling V\C and doing 2 things. Rotate the engine to where the 2 timing marks align between the 2 can gears and then align the yellow links to the top. Now look at the yellow links, they should be centered with a slot on right and a dot on left sprocket.
You can now check for tension on the chain between the sprockets and you can also see the the # 1 cylinder should be in TDC (valves closed) Now would be a great time to check valve clearances too.

I doubt you will find anything as Yota chains are bulletproof.

cooper barrett · 08-25-2017, 01:06 PM

Quote:

Originally Posted by Buehler445

They can go bad too. Not sure I've seen one go bad that hasn't broke and tore the hell out of everything while it gets wound up.

Jason is a better guy to ask than me.

If it's getting every cylinder it could be timing or a controller problem IMO. But I run Deere shit so I may be abnormally predisposed to controller problems.

I have never seen a yota chain brake (belt sure) but they never get wrapped around anything, either belt or chain, they just fall to the side. Old 22r and Re's would get loose and the chain would cut into the cooling jackets and flood the crank with antifreeze. Catch it too late and it takes the bearings out. I have rarely seen tensioners break (wear out sure) but if you're that far along you are replacing them anyway.

What Yota runs a Deere engine anyway

**Bugeater** · 08-25-2017, 01:07 PM

Quote:

Originally Posted by Nixhex

I am getting a P0102 code on my 02 Monte Carlo. The MAF sensor has been replaced and I have used a multimeter to confirm power to the MAF Sensor connection wire. What else could the problem be?

It's a GM product?

**Buehler445** · 08-25-2017, 01:20 PM

Quote:

Originally Posted by cooper barrett

I have never seen a yota chain brake (belt sure) but they never get wrapped around anything, either belt or chain, they just fall to the side. Old 22r and Re's would get loose and the chain would cut into the cooling jackets and flood the crank with antifreeze. Catch it too late and it takes the bearings out. I have rarely seen tensioners break (wear out sure) but if you're that far along you are replacing them anyway.

What Yota runs a Deere engine anyway

Not car. Sprayer, tractors, combine.

Hog's Gone Fishin · 08-25-2017, 01:29 PM

Sounds as though your fuel is watered down , you gotta get some into a cup so you can take a swig to see if you can taste any water.

kccrow · 08-25-2017, 01:30 PM

Quote:

Originally Posted by MagicHef

Yes, that was my first thought, as this car went through a phase where it liked to eat coils.

Assuming you probably did if you checked the coils, but did you also check the ignition module?

08-25-2017, 10:37 AM
MagicHef The Seated Villain Join Date: Apr 2007 Location: Seattle Casino cash: $560247	Car Help? I know there are some knowledgeable car guys on here, and maybe someone can help. My 2001 MR2 Spyder has been running really rough, and I've been running in circles trying to fix it. The previous owner installed an aftermarket turbo with custom headers and exhaust, K&N intake, piggyback ECU, anti-knock system, and higher flow injectors. I've had it for 5 years and it has been working well until recently, so I don't know that the issues are directly related to any of the modifications. So far I have replaced the fuel pump, fuel filter, fuel pressure regulator, fuel injectors, coils, spark plugs, camshaft sensor, crankshaft sensor, MAF sensor, and O2 sensors. It was simply running poorly (sounded like it had a dead cylinder) and not throwing codes, but after replacing the camshaft sensor it started giving codes again. Now it gives codes for misfires on all 4 cylinders, plus random misfires, and says the system is too lean. I am about out of ideas and hoping that I'm overlooking something obvious.
Posts: 10,753

08-25-2017, 11:17 AM	#16
cooper barrett MVP Join Date: Aug 2017 Casino cash: $10000400	Did you do a compression test A trick i used to use to test the Cat was to remove the O-ring from compression tester and screw it into the cat. I think that normal back pressure was about 10-12psi.
Posts: 13,669

08-25-2017, 11:37 AM	#18
Buehler445 Supporter Join Date: Apr 2007 Location: Scott City KS Casino cash: $-1385266	I don't know anything about the specific model or the mods but it might be a timing issue.
Posts: 59,933

08-25-2017, 12:20 PM	#21
Nixhex Chiefn' It Join Date: Jan 2009 Location: IndepMo Casino cash: $7545142	I am getting a P0102 code on my 02 Monte Carlo. The MAF sensor has been replaced and I have used a multimeter to confirm power to the MAF Sensor connection wire. What else could the problem be?
Posts: 1,488

08-25-2017, 12:35 PM	#22
TLO Life is changing.. Join Date: Jul 2012 Location: NW Missouri Casino cash: $-2380000	Sounds like a vacuum leak somewhere. EDIT: sounds like others have given that suggestion as well. Shouldn't be too difficult to do yourself.
Posts: 43,041

08-25-2017, 01:29 PM	#29
Hog's Gone Fishin Fish are scared of me Join Date: Nov 2001 Casino cash: $-1439523	Sounds as though your fuel is watered down , you gotta get some into a cup so you can take a swig to see if you can taste any water.
Posts: 40,646