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08-19-2015, 12:25 PM
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#1 |
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Member
Join Date: Dec 2011
Location: Indiana
Posts: 437
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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.
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2014 Cobra Jet FS/XX #3345 STK/SS Like us on http://www.facebook.com/pages/Daniel...25886327426822 |
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08-19-2015, 01:50 PM
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#2 |
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Veteran Member
Join Date: May 2006
Location: Murfreesboro TN
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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.
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Alan Roehrich 212A G/S |
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08-19-2015, 02:00 PM
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#3 |
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Member
Join Date: Aug 2003
Location: Solon Springs, WI
Posts: 166
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Re: EFI TROUBLE! ED W. All Cooters, Help!!
Find a convertor.
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08-19-2015, 02:08 PM
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#4 |
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Member
Join Date: Aug 2003
Location: Solon Springs, WI
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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.
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08-19-2015, 03:50 PM
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#5 |
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Junior Member
Join Date: Jan 2006
Location: Zeeland, MI
Posts: 98
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Liked 18 Times in 4 Posts
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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.
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08-19-2015, 05:32 PM
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#6 |
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Veteran Member
Join Date: Mar 2005
Location: Sand Springs, OK
Posts: 8,132
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Re: EFI TROUBLE! ED W. All Cooters, Help!!
Not sure why you want to graph your air/fuel or timing. Not much use there. numbers versus RPM are all you need.
I think it's your converter as well.
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Ed Wright 4156 SS/JA |
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08-19-2015, 09:08 PM
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#7 |
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Veteran Member
Join Date: Mar 2002
Location: Miles From Nowhere
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Re: EFI TROUBLE! ED W. All Cooters, Help!!
I doubt it's the converter.Of course I know why it always gets blamed. Black Magic.
So JR changed the engine oil and all of a sudden the converter doesn't work? If the sprag all of a sudden decided to slip, the lower numbers would be down, but the MPH would be the same ..within reason. Going the other way, if all of a sudden the vanes in the pump decided to fly off , the stall would be way high, and the low numbers would be off, but the rpm in the lights would be sky high. In this case ,it would last about one run, and the trans would be full of metal.. Back to the EFI guys...
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"We are lucky we don't get as much Government as we pay for." Will Rogers |
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