HELP! Idle surging problem...

[LEATHL EG]

HELP! Idle Surging ('93 EG) 11:01 PM 7/21/2002


Where should I start...

This has been the all time worst and definately most costly problem I have faced in the six years I have owned this car.

The idle is constantly surging between 1500 and 2500. I start the car and it may take five or maybe 15 seconds for it to start, but it has been doing this since before I put her up last winter.

Here is the background on the car:

It's a '93 Civic Coupe DX with a swapped D16Z6. Last year when I was stuck in traffic, I noticed that it was over heating and it managed to get to the point of boiling over and off the top of the temp guage by the time I could reach a spot on the highway to pull over. The radiator was toasted and the fan for what ever reason was not kicking on when the temp would get high.

After this happened I decided to put in a GSR radiator and a FAL fan to avoid any further cooling issues. The day that I did this my car began it's trip down idle surging lane. I initially thought that it was air in the cooling system and I bled it like ten times and couldn't get all of the air out. So, I took it in to the dealership and had them do a professional coolant flush. They told me that they couldn't pressurize the cooling system and that I had a blown head gasket. Great!

Since then I had the head checked and it wasn't cracked so I had a valve job and the head milled. I replaced all of the gaskets with a head set. This was not the problem. I have checked cam timing, it is absolutely perfect, and there is no chance of air getting into the cooling system from the head.

This is what I have replaced or bought since then:

ProFlo Throttle body (59mm)
TPS
MAP Sensor
O2 Sensor
Distributor, Cap, and Rotor
MSD SCI Ignition, Plug Wires, Coil
Timing belt
Alternator, and belt
Battery
Colored Hose kit (hoping to eliminate a vacum leak)

The error codes we keep getting when we short the ECU are seven and three. Someone told me that those are the TPS and MAP. Which I have already replaced. Is this right? I don't have a place to check error code numbers. One time we got a fourteen, but that was after we switched around the wiring harnesses for the TPS and MAP.

I have taken it to like five different mechanics and no one tell me anything. They all wind up blaming it on this extra wiring harness that is hanging off of the firewall next to the TPS. It is just and extra harness that was left over from the 1.5 that was in there before the swap. Just to clarify the swap ran fine for two years before this all went down.

I have no idea what else to do and I have already spent like $900 dollars in the last two weeks alone. If some one could give me any help I would seriously be in debt to them for the rest of my life.

Thanks,

Kyle

[1995HondaCivic]

you only need one post for the same topic bro, and your car is an ej1, not an eg.

[LEATHL EG]

I'm sorry about that, I guess that is something I should have known already, but it's only the first post I've ever made. I simply thought I might have posted it in the wrong section after I read the other forums criteria. (My Bad!)

So, I guess this means you don't have any advice? Other than my car is an EG1 not an EG. What's the difference between the two?

[Crazyeight]

When you changed you TPS and MAP, did you replace the fast idle valve? Did the Pro Flow throttle body come with a different fast idle valve? If not, check it. On a D16z6, pull the throttle body off. Remove the fast idle valve (below intake on throttle body). If it's leaking or seals are out of place, then you've found your problem.

[Ricochet]

I'm pretty sure he's fixed his problem by now noob, seeing how he posted it 6 1/2 months ago.

[BlackBlur]

ok what i would say is wrong with your car is your o2 sesnsor check it and make sure there is power going to it with a test light,because one of my friends has a 93 civic and the person that had it before him replaced the headers and didnt buy the right kind of headers with the hole in it for the o2 sensor definitely check that,his car does the same exact thing as you described

[Ricochet]

hey dumbass, he's not even a part of this board anymore.. he posted this in July

[Miataracer]

OWN3D...? lol

[damir831]

Originally Posted by Ricochet

hey dumbass, he's not even a part of this board anymore.. he posted this in July

LOL, I'll bet you someone else will reply and tell him what's wrong with the car.