Home and Auto Car Help? - Page 3

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.

**ptlyon** · 08-25-2017, 01:32 PM

Quote:

Originally Posted by kccrow

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

What about the setzer valve?

kccrow · 08-25-2017, 01:34 PM

Quote:

Originally Posted by ptlyon

What about the setzer valve?

is that part of the nanotube high displacement transmission control arm?

cooper barrett · 08-25-2017, 01:36 PM

Quote:

Originally Posted by Buehler445

Not car. Sprayer, tractors, combine.

I was joking...

cooper barrett · 08-25-2017, 01:53 PM

Quote:

Originally Posted by kccrow

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

Usually it it runs the Ign. module is good but it never hurts to check for opens or shorts.

cooper barrett · 08-25-2017, 01:53 PM

Quote:

Originally Posted by ptlyon

What about the setzer valve?

Brian or Scott

**hometeam** · 08-25-2017, 01:59 PM

I didnt read all the replies, but before doing all that crap I hope you checked for a boost leak.

Aftermarket turbo stuff of unknown install quality and those symptoms that would be my first thought. Too lean = unmetered air getting in.

A good rule of thumb is to never just throw parts at a car :/

kccrow · 08-25-2017, 02:05 PM

Quote:

Originally Posted by cooper barrett

Usually it it runs the Ign. module is good but it never hurts to check for opens or shorts.

Probably a good idea. I had a Bonneville that did that... changed all the coils and still ran like ass and would just die out. Changed the IM and away she went.

**notorious** · 08-25-2017, 04:42 PM

Quote:

Originally Posted by Buehler445

Riiiiiiiiiiiiiiiiiiiight

Gotta expense a lot of gear to avoid taxes since the corn prices have skyrocketed.

**Buehler445** · 08-25-2017, 05:27 PM

Quote:

Originally Posted by notorious

Gotta expense a lot of gear to avoid taxes since the corn prices have skyrocketed.

You have the chart upside down dogshizzle!

**Buehler445** · 08-25-2017, 05:29 PM

Quote:

Originally Posted by cooper barrett

I was joking...

Heh. You're read again. I didn't do it.

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, 01:59 PM	#36
hometeam Supporter Join Date: Jul 2011 Casino cash: $1611956	I didnt read all the replies, but before doing all that crap I hope you checked for a boost leak. Aftermarket turbo stuff of unknown install quality and those symptoms that would be my first thought. Too lean = unmetered air getting in. A good rule of thumb is to never just throw parts at a car :/ Last edited by hometeam; 08-25-2017 at 02:26 PM..
Posts: 10,764