Use of Tech 1

[richarde]

Originally Posted by richarde

I am looking for a little help in using my Tech 1 equipment and was wondering if anyone can assist. I have had my 1990 ZR for nearly 10 years and it has just developed rough running when cold, including a massive bog when accelerating. It is fine when warm. I wish to check for any ECM Trouble codes and am looking for some info on carrying out a straightforward check using the Tech 1.

Please note that I have placed a jumper wire across points A and G of the ALDL connector and have 3 CCM TC's - H72, H74 and H22. I am aware of these and know the reasons why they occurred.

Any help with how to use the Tech 1 to interogate the ECM would be much appreciated.

Thanks,
Richard - 1990 Charcoal and Grey

Thanks to everyone who has replied to this post - I am planning to connect up tomorrow - I'll leave an update on my results!
Thanks again,
Richard

[richarde]

Originally Posted by XfireZ51

IS your CEL ON?

Hi - When the engine was cold and running rough, the 'service engine soon' light flashed on / off a few times. After it warmed up, the engine was fine with no flashing light - it remained off.
I'm planning on spending some time on it tomorrow - Monday.
Thanks for coming back to me,
Richard

[richarde]

Originally Posted by richarde

I am looking for a little help in using my Tech 1 equipment and was wondering if anyone can assist. I have had my 1990 ZR for nearly 10 years and it has just developed rough running when cold, including a massive bog when accelerating. It is fine when warm. I wish to check for any ECM Trouble codes and am looking for some info on carrying out a straightforward check using the Tech 1.

Please note that I have placed a jumper wire across points A and G of the ALDL connector and have 3 CCM TC's - H72, H74 and H22. I am aware of these and know the reasons why they occurred.

Any help with how to use the Tech 1 to interogate the ECM would be much appreciated.

Thanks,
Richard - 1990 Charcoal and Grey

Hi - Thanks to all your help, I have now sucessfully used the Tech 1 and established the DTC was a code 22 - Throttle Position Sensor Voltage Low. I unplugged the connector and re-connected it, making sure that it was correctly seated etc. I erased the DTC and road tested the car. So far, everything OK, with no new code appearing.
Thanks again for your help - the Tech 1 looks FUN!!
Richard.

[Socalerv]

I could definitely use a copy of the manual. My email is:

erv.myers@oxbow.con

Thanks you

[HAWAIIZR-1]

Originally Posted by richarde

Hi - Thanks to all your help, I have now sucessfully used the Tech 1 and established the DTC was a code 22 - Throttle Position Sensor Voltage Low. I unplugged the connector and re-connected it, making sure that it was correctly seated etc. I erased the DTC and road tested the car. So far, everything OK, with no new code appearing.
Thanks again for your help - the Tech 1 looks FUN!!
Richard.

Hello Richard,

I see that you are in the UK so if you don't already have a TPS on hand, I would suggest you order one. If you need help from to order or ship, let us know. I had the exact same symptoms not too long ago and then the TPS crapped out on me. I don't know why it was funky like that and had intermittent issues, but after replacement it has been good to go. At first I adjusted it and then it acted up so replacement was the way to go.

Best wishes.
Craig

[richarde]

Originally Posted by HAWAIIZR-1

Hello Richard,

I see that you are in the UK so if you don't already have a TPS on hand, I would suggest you order one. If you need help from to order or ship, let us know. I had the exact same symptoms not too long ago and then the TPS crapped out on me. I don't know why it was funky like that and had intermittent issues, but after replacement it has been good to go. At first I adjusted it and then it acted up so replacement was the way to go.

Best wishes.
Craig

Hi Craig
Thanks for the info - I thought that I had the cured the problem only for it to re-appear! Another code 22 and running rough. This time I removed the TPS and found that it was the problem - wide open it was only registering 1.5 to 2 volts instead of min 4.5v. I have ordered a new one from the States today, so it should be here by next weekend.
Thanks again for the info,
Richard

[HAWAIIZR-1]

Originally Posted by richarde

Hi Craig
Thanks for the info - I thought that I had the cured the problem only for it to re-appear! Another code 22 and running rough. This time I removed the TPS and found that it was the problem - wide open it was only registering 1.5 to 2 volts instead of min 4.5v. I have ordered a new one from the States today, so it should be here by next weekend.
Thanks again for the info,
Richard

Hello Richard,

Okay, I hope it all works out with the new part. You want it at .53 volts when closed and maybe even visually see your throttle plate to ensure it its fully closed. Then monitor the % of throttle opening with the voltage of TPS for smooth operation and fully open what voltage and 100% open throttle, etc. I found mine was a little sticky too so it was lubricated. I used my Datamaster when making the setting and can't remember if the Tech 1 has % of throttle position while seeing the voltage at the same time. Best wishes and let us know how it all works out.

Craig

[Wiscokid]

Originally Posted by LGAFF

I have the manuals for Tech 1 if needed, just need your e-mail

I found your post on the forum and I was wondering if you could send me a copy of the Tech 1A manuals. My email address is slunenschloss@yahoo.com

Thanks,
Steve