First DataMaster run, need help
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Joined: Dec 2006
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From: Little Rock Arkansas
First DataMaster run, need help
Car Type: 84 Vette
FUEL: TPI conversion, speed density, aftermarket harness, f-body ecm, no air pump
SYMPTOM: Car will not make power after throttle is depressed more than 1/4 inch. At WOT, the engine sounds as if it
sucking nothing but air.
WORK DONE: replaced IAC - for varying idle & cleaned throttle body, plugs, cap/rotor, replaced TPS. I just made a pass with DataMaster. Is anyone willing to look at the file and make suggestions? I'm new to TPI and having a conversion is making it much more difficult to troubleshoot. The sensors were replaced using a match to the f-body ecm.
FUEL: TPI conversion, speed density, aftermarket harness, f-body ecm, no air pump
SYMPTOM: Car will not make power after throttle is depressed more than 1/4 inch. At WOT, the engine sounds as if it
sucking nothing but air.
WORK DONE: replaced IAC - for varying idle & cleaned throttle body, plugs, cap/rotor, replaced TPS. I just made a pass with DataMaster. Is anyone willing to look at the file and make suggestions? I'm new to TPI and having a conversion is making it much more difficult to troubleshoot. The sensors were replaced using a match to the f-body ecm.
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Joined: Dec 2006
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From: Little Rock Arkansas
Here is the link....http://www.savefile.com/files/529353.
"Is it speed density Fbody code that is $8D?"-yes
The engine is the original that came with the car and I believe it to be stock. The fuel pressure is monitored by a digital fuel pressure gauge and is 32# at idle/36#@WOT. I plan to pick up an analog gauge to verify the accuracy of the digital. One of the things I noticed on the DataMaster run is the ignition advanced varying at idle as well as the Air temp at the manifold. I don't know if these values are normal or not. Also, take a peak of the log at times between 4:21:47pm to 4:21:52pm. This is a portion of WOT.
Thanks for the interest
"Is it speed density Fbody code that is $8D?"-yes
The engine is the original that came with the car and I believe it to be stock. The fuel pressure is monitored by a digital fuel pressure gauge and is 32# at idle/36#@WOT. I plan to pick up an analog gauge to verify the accuracy of the digital. One of the things I noticed on the DataMaster run is the ignition advanced varying at idle as well as the Air temp at the manifold. I don't know if these values are normal or not. Also, take a peak of the log at times between 4:21:47pm to 4:21:52pm. This is a portion of WOT.
Thanks for the interest
Last edited by Moto1; Mar 2, 2007 at 11:09 PM.
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From: Renton Wa.
I am by no means am an expert at this, but first off that fuel pressure is 10# low. I tried to view your data log but was unable to open it? What are the blm readings, I would guess way over 108 since it is probably way lean. Injector size? Do you have the correct bin file on the chip?
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Joined: Dec 2006
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From: Little Rock Arkansas
I am by no means am an expert at this, but first off that fuel pressure is 10# low. I tried to view your data log but was unable to open it? What are the blm readings, I would guess way over 108 since it is probably way lean. Injector size? Do you have the correct bin file on the chip?
Here is the link with the data for excel...http://www.savefile.com/files/530287
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From: Little Rock Arkansas
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From: Little Rock Arkansas
Ok, here is the new link with the MAP data...http://www.freefileupload.net/file.p...rstrunwmap.csv
Is the data regarding the duty cycle of the injectors being generated by the ECM or is the ECM limiting the injectors to 50%? Did I ask that correctly?
Is the data regarding the duty cycle of the injectors being generated by the ECM or is the ECM limiting the injectors to 50%? Did I ask that correctly?
Racer
Joined: Apr 2003
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From: Detroit MI
The host was too busy to allow me to download your file.
Is the map sensor data doing what you would expect it to do at WOT?
Have you verified the fuel pressure guage yet?
To answer your question
I would say yes to both. The ECM is doing what it thinks it correct via the input from sensors like map, O2, and iat. Datamaster is reading the duty cycle from the ECM.
Is the map sensor data doing what you would expect it to do at WOT?
Have you verified the fuel pressure guage yet?
To answer your question
Is the data regarding the duty cycle of the injectors being generated by the ECM or is the ECM limiting the injectors to 50%? Did I ask that correctly?
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From: Little Rock Arkansas
Hmmmm. That is a delima. All the sensors seem to be reporting correctly however the ECM shunts to the injectors? What in the world could be going on? I did get a chance to check the Fuel Pressure before I left. The analog gauge reports between 40 & 43#s at idle so the digital gauge is off. Also the MAP sensor was @ 29.4 inches/mercury @ WOT.
Last edited by Moto1; Mar 6, 2007 at 09:34 PM.
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From: Little Rock Arkansas
Il'l be more than happy to e-mail it to whoever is intrested. Just went to fire it up and now it won't idle and I have to keep the throttle raised just to keep it running with heavy misses. Maybe it will show its true problem. I will check all the norms tomorrow.
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From: Little Rock Arkansas
Ok, here's the latest. Car won't hit at all. Replaced the ECM just to do it because of the earlier threads. Plugs are firing so I figured it must be fuel. 42#'s on the fuel rail. I pulled an injector connector from each side and cranked the engine. I noticed that each side of the connector had around 9 volts while cranking. Should'nt I see one side of the connector go low during cranking? Both right and left bank injectors are producing this result. Same thing with the old ECM.
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From: Little Rock Arkansas
Also, the SES light comes on when the key is placed in the run position. I guess a true test would be to place a DC lamp in the connector, spin the engine, and see if the light pulsates.
Last edited by Moto1; Mar 11, 2007 at 09:10 AM.
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From: Renton Wa.
Yes on the pass/driver side injector batch fire. They make a special light that you plug into the wire harness and watch for the injector signal. I would be careful about plugging any light into it because you could burn up the ecu board if the resistance is not correct. Light will draw too many amps.
The SES light should flash one time when the key is first turned to run which indicates a correct functioning chip.
The SES light should flash one time when the key is first turned to run which indicates a correct functioning chip.