1G Just bought my first 1g Eclipse and it will start with pedal held down but will not idle

[Trilo311]

I trying to get the car to idle, it turns over and if hold the gas down a little it will run. It will not idle, It has HKS VPC/GCC on it. The person i bought it from said it has a turn on the EPROM.

I found cylinder 2 has 80 psi for compression and 1, 3 and 4 are at 160psi. I smells like it dumping a ton of fuel. I need some help figure out this VPC/GCC or should just take them out.

I doing more troubleshooting on the cylinder 2 issue tomorrow. I have no smoke from tail pipe when it runs but has the misfire in cylinder 2. Was wondering if maybe the cylinder got washed down from the fuel. Is there any default setting for the VPC/GCC to lean it out but not completely starve it of fuel?

 

[steve]

Seriously old school and difficult to find documentation anymore.
I'm not sure anyone would recommend them today over a good MAF or running Speed Density.

I assume this is a new to you car. You'll need to inventory all of what's in it and build a profile.

There are a few old threads like this one that might be helpful.

General - HKS VPC & GCC

:confused: How to use my VPC & GCC?

www.dsmtuners.com

 

[Trilo311]

Seriously old school and difficult to find documentation anymore.
I'm not sure anyone would recommend them today over a good MAF or running Speed Density.

I assume this is a new to you car. You'll need to inventory all of what's in it and build a profile.

There are a few old threads like this one that might be helpful.

General - HKS VPC & GCC

:confused: How to use my VPC & GCC?

www.dsmtuners.com

Yea pretty new to me, I but I work for bmw about 15 years ago some car knowledge. But the old tech is got me scratching my head. The dude I bought it from have it since 94 and said its stage 2 cams, Its got a front mount, full exhaustand a tune. I found alittle bit of on the vpc but nothing for the gcc. I thinking about taking it out and getting ecmlink. I just got the car today after being out of town for a week so i have had but a couple hours messing with the car. I pretty pump about it,

 

[ist dwa]

There is something mechanically wrong if you only have 80psi in a hole, rings, valve, gasket, etc.

I think with that tuning combo you leave the vpc alone and just tweak the gcc. Some vpc could get a 660 injector eprom chip from buschur, you have to take it apart to see. I don't remember if there are any visual ques to differentiate, I had one a long time ago.

 

[1990TSIAWDTALON]

And maybe a bad O2 sensor??? Just wingin it.

 

[Turbski91]

first step is figuring out why that cylinder only has 80psi. That’s most likely why it smells like it’s pouring fuel. Could have a cracked piston, block, head, a bent valve or broken valve spring. I would throw a little oil in the cylinder and redo the compression test. If the compression goes up a lot it’s most likely just worn rings. After that i would try a leak down test. Most auto stores will have that for rent.

 

[Trilo311]

first step is figuring out why that cylinder only has 80psi. That’s most likely why it smells like it’s pouring fuel. Could have a cracked piston, block, head, a bent valve or broken valve spring. I would throw a little oil in the cylinder and redo the compression test. If the compression goes up a lot it’s most likely just worn rings. After that i would try a leak down test. Most auto stores will have that for rent.

A buddy is going to let me use his borescope, I have some seaform sitting in the cylinder right now.

 

[Turbski91]

A buddy is going to let me use his borescope, I have some seaform sitting in the cylinder right now.

Bore scopes are good, but don’t be surprised if you don’t see anything. Since you’re getting 80psi i would be suprised if you see anything with it. Good luck tho! Report back! I’m very curious.

 

[Trilo311]

Bore scopes are good, but don’t be surprised if you don’t see anything. Since you’re getting 80psi i would be suprised if you see anything with it. Good luck tho! Report back! I’m very curious.

saw some scoring on the cylinder wall, so I'm process of pulling the head off when I have time to work on it. The previous owner hacked the engine harness to hell so ill be fixing or finding a replacement harness. The dude hard wired the tps sensor in the engine harness. A lot miss matched bolts too.