EFI TROUBLE! ED W. All Cooters, Help!!

Pedigo Perf · 08-19-2015, 06:39 AM

Did you measure the amount of oil you drained out? Maybe it is carrying more now,

If it has the same RPM but lost 8 MPH then it about has to be in the converter.

Mike Pearson · 08-19-2015, 08:53 AM

I would shy away from any AC Delco filters. I had several collapse due to plastic internals. Cost me an engine. Check the filter it could be collapsed. Now I run a System One reusable filter. No more passenger car filters or oil.

ALMACK · 08-19-2015, 11:30 AM

Quote:

Originally Posted by Pedigo Perf

Did you measure the amount of oil you drained out? Maybe it is carrying more now,

If it has the same RPM but lost 8 MPH then it about has to be in the converter.

^^ That 8 mph difference is what stood out to me.

D.Johns · 08-19-2015, 12:25 PM

I've seen where a two-step would intermittently come off and on during a run as the car vibrations made the switch connections. Picked it up on the data logger for the ECU.

Also seen where the O2 sensor has went bad threw the computer into safe mode since when the sensor fails it fails lean.

Check TPS and throttle opening 100% physically.

Could be a valve hanging open at the top of the rev range or ring flutter also.

Lots of possibilities just have to start the process of elimination with any data you have.

Alan Roehrich · 08-19-2015, 01:50 PM

A lot of your information points directly at the torque converter.

You should absolutely verify the correct tune is loaded in the ECM, as well as verifying that the timing and fuel pressure are actually correct as read by gauges and a timing light. If all of that is correct, then look at the converter.

Mike is correct about filters. The only short AC Delco filter you can trust is PF2232, the Duramax filter, which does work on the small block and big block, at least for me. Other than those, I now use Wix Racing filtrs.

Tim Lisson · 08-19-2015, 02:00 PM

Find a convertor.

Tim Lisson · 08-19-2015, 02:08 PM

Oh, one other potential, remove all of your injectors and spray carb cleaner in screens and blow compressed air to dry. Reassemble. With batch fire your o2 will not show a dead hole on one side.

Tony Goodman · 08-19-2015, 03:50 PM

Turbo 200 trans, possibly broken stator support in the trans. Had that happen before, thought it was the ecu also.

08-19-2015, 06:39 AM	#1
Pedigo Perf Member Join Date: Feb 2008 Location: Wichita Ks Posts: 383 Likes: 70 Liked 30 Times in 17 Posts	Re: EFI TROUBLE! ED W. All Cooters, Help!! Did you measure the amount of oil you drained out? Maybe it is carrying more now, If it has the same RPM but lost 8 MPH then it about has to be in the converter.

08-19-2015, 08:53 AM	#2
Mike Pearson VIP Member Join Date: Mar 2007 Posts: 2,443 Likes: 613 Liked 1,916 Times in 574 Posts	Re: EFI TROUBLE! ED W. All Cooters, Help!! I would shy away from any AC Delco filters. I had several collapse due to plastic internals. Cost me an engine. Check the filter it could be collapsed. Now I run a System One reusable filter. No more passenger car filters or oil. __________________ Mike Pearson 2485 SS

08-19-2015, 12:25 PM	#4
D.Johns Member Join Date: Dec 2011 Location: Indiana Posts: 437 Likes: 15 Liked 18 Times in 6 Posts	Re: EFI TROUBLE! ED W. All Cooters, Help!! I've seen where a two-step would intermittently come off and on during a run as the car vibrations made the switch connections. Picked it up on the data logger for the ECU. Also seen where the O2 sensor has went bad threw the computer into safe mode since when the sensor fails it fails lean. Check TPS and throttle opening 100% physically. Could be a valve hanging open at the top of the rev range or ring flutter also. Lots of possibilities just have to start the process of elimination with any data you have. __________________ 2014 Cobra Jet FS/XX #3345 STK/SS Like us on http://www.facebook.com/pages/Daniel...25886327426822

08-19-2015, 01:50 PM	#5
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,104 Likes: 1,560 Liked 1,784 Times in 407 Posts	Re: EFI TROUBLE! ED W. All Cooters, Help!! A lot of your information points directly at the torque converter. You should absolutely verify the correct tune is loaded in the ECM, as well as verifying that the timing and fuel pressure are actually correct as read by gauges and a timing light. If all of that is correct, then look at the converter. Mike is correct about filters. The only short AC Delco filter you can trust is PF2232, the Duramax filter, which does work on the small block and big block, at least for me. Other than those, I now use Wix Racing filtrs. __________________ Alan Roehrich 212A G/S

08-19-2015, 02:00 PM	#6
Tim Lisson Member Join Date: Aug 2003 Location: Solon Springs, WI Posts: 166 Likes: 0 Liked 0 Times in 0 Posts	Re: EFI TROUBLE! ED W. All Cooters, Help!! Find a convertor.

08-19-2015, 02:08 PM	#7
Tim Lisson Member Join Date: Aug 2003 Location: Solon Springs, WI Posts: 166 Likes: 0 Liked 0 Times in 0 Posts	Re: EFI TROUBLE! ED W. All Cooters, Help!! Oh, one other potential, remove all of your injectors and spray carb cleaner in screens and blow compressed air to dry. Reassemble. With batch fire your o2 will not show a dead hole on one side.

08-19-2015, 03:50 PM	#8
Tony Goodman Junior Member Join Date: Jan 2006 Location: Zeeland, MI Posts: 98 Likes: 135 Liked 18 Times in 4 Posts	Re: EFI TROUBLE! ED W. All Cooters, Help!! Turbo 200 trans, possibly broken stator support in the trans. Had that happen before, thought it was the ecu also.