Long story short I have a 99 Integra with a chipped P75 and conversion harness. My car has been getting thrown into limp mode and I need to see which code is causing the issue.

When I jump the service connector, the CEL just stays solid. I am using crome free and I was wondering if there is some setting that affects not being able to use the service jumper to check??? Has anyone else had this problem?

Thanks
WF

 

If it goes into limp mode it's not as simple as just a code. If it's in limp you can't check the code because it's no longer running off the chip. Does it do it immediately? Or after being driven?

If it's immediately, the program wasn't setup right for the ECU or the socketing job was not good.

 

Did you make sure that you removed the check sum form your .bin (Crome) file before you burned it to the chip? If you forgot to remove it in Crome that will cause a solid CEL. A solid CEL with the SRS connector in means that there are no stored codes on the ECU.


Modified by GhostAccord at 4:51 PM 1/22/2008

 

If I let the car sit for a while I can go out and start it just fine and drive off with no problem. There is no check engine light and it runs great.

If I drive for a while sometimes the CEL will come on, but it won't immediately go into limp mode. It will still run fine for a while, and the randomly go into limp mode.

check sum is disabled on my ROM, but I will reload the .bin to my ecu to make sure.

I am sure the socketing job has no problems. Anyone else have any ideas?

 

Is your car tuned?

I'm going to take a guess that you are doing all of this yourself. Just a heads up. I wouldn't be driving around for extended periods on a self chipped ECU running an un-tuned Crome Free base map. I know that you are unable to datalog with crome free. So I would suggest that you find someone that has access to a laptop and crome pro, or some other tuning and dataloging software, so you can at least street tune your car. It would be much easier to diagnose if you could at least datalog.

 

So today I had a chance to mess around with everything a little bit more. But I will start with what happened yesterday...

I had to drive about an hour away last night to go get some stuff from Best Buy. Car was running great, no CELs, nothing. I was about 40-45 minutes into the drive when it got thrown into limp mode. Glad I have an LS trans since limp mode limits the revs to 4000 rpm, and I was cruising about 80 mph. I happened to have my laptop with me, so I plugged it in and immediately the CEL was off, and the car was running normal again.

Today I went out there to start the car, which it did fine. I plugged my laptop into it (ECU, Ostrich, and Laptop were all communicating perfectly -- RTP was fine too), made a few small adjustments, and went to unplug the USB port which goes to the Ostrich. Car was still cold (ECT guage below the C). Made the disconnection, and the car was still running fine.


So I figured I would sit there and let it warm up and see what happens. After I let it idle for a while it goes back into limp mode. So I plug my laptop back in, and the car immediately runs fine again. Unplugged my computer again and the car proceeded to go into limp mode.

My thoughts on this were that the USB is supplying the Ostrich power (maybe the 3 AAA batteries are dead?) but when this is happening I cannot connect to the ECU anymore.

Replaced the batteries in the Ostrich, still having the same problem. I am totally lost. Any help would be awesome.

Thanks
Tony

 

Are you able to burn your bin file to an eprom chip and put that on the ECU in place of the ostrich connection? That way you can see if it is the ostrich that is causing the fault for sure.

 

I think I fixed it. It may have been a loose connection!! Thanks for all the replies.

Tony