This is topic Sn95 spuddering nopower in forum Tech Talk at Northern California Ford Owners .
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Posted by lsfoxbody (Member # 8820) on
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I just picked up this car the problem had gotten worse over the week popping thru the intake spuddering nopower did cap rotor wires plugs and maf sensor still no improvement timing set at 13 deg adv from what I can tell car has bolt on with f-cam any help would be appreciated thank you
Posted by Martinna (Member # 12493) on
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Not enough timing or fuel. Is the spout connector in? Does unplugging the MAF help? Computer codes might give you a clue.
Posted by lsfoxbody (Member # 8820) on
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Spout connector is in total timing at 36 #24 injectors with matching maf codes are 117 ect sensor and 217 coil #3 failure
Posted by lsfoxbody (Member # 8820) on
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I'm going to go thru the engine harness today and check all connections and ground's
Posted by lsfoxbody (Member # 8820) on
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I unplugged the maf and problem stopped what does that mean
Posted by Martinna (Member # 12493) on
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If a coil pack #3 is bad, move it to the other side of the engine. If the error code moves with the coil, replace the coil.
Unplugging the MAF fixing the problem means the problem could be the MAF reading lean. Did debris or K&N oil get on its elements?
Posted by lsfoxbody (Member # 8820) on
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It only has one coil it's a 95 5.0 the maf is brand new
Posted by Martinna (Member # 12493) on
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Did the MAF ever work right? It's probably not matched to your injectors. Does your EEC have a chip?
Posted by lsfoxbody (Member # 8820) on
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Only had the car for a week not sure if ever worked right it is matched to the injectors I haven't looked for a chip yet
Posted by Martinna (Member # 12493) on
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With out a chip, how do you know you have 36 degrees total timing? Put on a stock MAF or one rated for 19lbs injectors to test.
[ 2017-09-26, 12:34 PM: Message edited by: Martinna ]
Posted by lsfoxbody (Member # 8820) on
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I have a digital timing light tell's me the degrees I'm try to see if I can Barrow a stock maf
Posted by Martinna (Member # 12493) on
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With the spout connected plugged in the computer always changes the timing. Your reading of 36 doesn't mean much. Check for a chip on the EEC.
Posted by lsfoxbody (Member # 8820) on
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So I found out that it still has the automatic eec in the car so looks like I need a 5 speed eec my question is should I get a cobra eec to work with my 24 pound injectors or gt eec and keep the calibrated maf
Posted by lsfoxbody (Member # 8820) on
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Never mind double check my eec is t4m0 with no chip very dirty in side hole not covered
Posted by Martinna (Member # 12493) on
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The cobra calibrates 24 lbs injectors in the computer, not the MAF. Stock heads? 19 lbs injectors are good for stock heads. Which MAF do you have?
Posted by lsfoxbody (Member # 8820) on
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Summit maf Cal for 24 pound injectors I have 24 pound injectors not sure what heads they look stock now that I replace the ect sensor I have no codes except for the maf being unplugged maybe bad dizzy it is msd
Posted by Martinna (Member # 12493) on
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A bad maf or injector maf mismatch is my guess. To check the dizzy, unplug the spout connector and rev the motor while checking timing. Timing should be locked. Next plug in the spout and rev the motor. The timing should advance. Don't over look vacuum leaks, a bad plug, a bad wire.
Posted by WANARNM (Member # 587) on
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Fuel Pressure?
Posted by lsfoxbody (Member # 8820) on
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No fuel psi is 39 found the problem in the o2 sensor circuit haven't looked at it yet to see if it's wiring or sensors
Posted by lsfoxbody (Member # 8820) on
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So I got power and ground to the o2 sensors output volts are 1.22 at part throttle and bounce at idol .1-1.2 volts not sure if this is normal reading with o2 sensors unplugged it runs great
Posted by Martinna (Member # 12493) on
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You can't test O2 sensors like that. What if you unplug only one of them? Try unplugging one at a time. Clear the computer codes and drive around. Scan for codes and post them.
Posted by lsfoxbody (Member # 8820) on
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Replaced 02 sensors problem fixed thank you for your help
Posted by Martinna (Member # 12493) on
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Good job. Did the computer codes tell you the O2 sensors were bad, or else how did you figure it out?
Posted by lsfoxbody (Member # 8820) on
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The ecm was throwing a extra digit in the flash codes had codes that didn't make sense removed one digit and found 02 sensor codes that's when I tested output voltage and found them out of range also the part number were wrong
Posted by Martinna (Member # 12493) on
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Easy fixes are good. The part number difference probably caused no harm.
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