1997 powerstroke wont start or run. one for the pros!!!!
#31
02-07-2012, 08:17 PM
We discussed the chance that the wires were mixed up when the new pigtail was put on. It just hasnt been confirmed yet. I wouldnt know how you could confirm if the were mixed up.
4 doesnt seem to be the DC. We talked on the phone earlier and he said the mechanic was reading the scanner. and from start up, it(whatever was being read) started out at 11 then slowly declined while idling until it reached 4 then the truck died.
We have talked about a scanner, him buying one or getting one to him. He lives 25 miles from town and the mechanic, so towing it there is a huge pain in the azz. But he may be able to get a scanner to him. But its hard to read vitals without a running truck, unless there are somethings that can be read without it running?
4 doesnt seem to be the DC. We talked on the phone earlier and he said the mechanic was reading the scanner. and from start up, it(whatever was being read) started out at 11 then slowly declined while idling until it reached 4 then the truck died.
We have talked about a scanner, him buying one or getting one to him. He lives 25 miles from town and the mechanic, so towing it there is a huge pain in the azz. But he may be able to get a scanner to him. But its hard to read vitals without a running truck, unless there are somethings that can be read without it running?
Either with a gauge , or a scanner & a DVOM ...
#32
02-07-2012, 08:21 PM
#33
02-07-2012, 08:33 PM
The only reason I am wondering is because the symptoms before the mechanic got involved do seem to match what chaffed wires on the IPR can act like. Fix that problem and completely different symptoms show up, it makes you wonder.
#34
02-07-2012, 08:34 PM
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If the PCM sees 3000 PSI at low RPM it will expect the IPR to be nearly closed at that point.. Most times IPR DC% @4 % ,the engine will run with the IPR unplugged.. The Resistance the PCM sees Via the ICP is caused by something other than calling for the IPR to close , its closing on its own or the path to the drain is blocked , which by itself raises ICP .. If the sensor is working (ICP) it will try to open the IPR , but cannot , that drops the IPR DC% but ICP remains high .. It will usually confuse(in simple terms) the PCM to the point that it cannot function ...
Yea thats been talked about but how can we confirm that they are switched? Im guessing different color wire covers?
#36
02-07-2012, 08:45 PM
If the PCM sees 3000 PSI at low RPM it will expect the IPR to be nearly closed at that point.. Most times IPR DC% @4 % ,the engine will run with the IPR unplugged.. The Resistance the PCM sees Via the ICP is caused by something other than calling for the IPR to close , its closing on its own or the path to the drain is blocked , which by itself raises ICP .. If the sensor is working (ICP) it will try to open the IPR , but cannot , that drops the IPR DC% but ICP remains high .. It will usually confuse(in simple terms) the PCM to the point that it cannot function ...
#37
02-07-2012, 08:51 PM
#38
02-07-2012, 08:56 PM
I touched a probe on the 12 v side to ground momentarily ...(sigh)
#39
02-07-2012, 09:28 PM
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Oh chit ouch. This got me thinking if its the IDM. I've been meaning to sudjest switching his IDM with a known good one.
#40
02-07-2012, 09:44 PM
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When you go an crank on it are you letting the wait to start light go out? if there is no wait to start you may want to check your GPR. My truck wouldnt start on two diffrent times because of a bad GPR (Glow Plug Relay) Look at the picture above it shows you where its at if your dont know where its at. Better eliminate possible causes before spending alot of money and time.
#41
02-07-2012, 09:50 PM
#42
02-07-2012, 09:52 PM
When you go an crank on it are you letting the wait to start light go out? if there is no wait to start you may want to check your GPR. My truck wouldnt start on two diffrent times because of a bad GPR (Glow Plug Relay) Look at the picture above it shows you where its at if your dont know where its at. Better eliminate possible causes before spending alot of money and time.
#43
02-07-2012, 10:00 PM
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#44
02-07-2012, 10:31 PM
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#45
02-07-2012, 11:19 PM
^^^^^ WTS light has NOTHING to do with the GPR. If the WTS light is out, it's a PCM issue. GPR failure has to be tested with a meter.
It hasn't been mentioned here, but in the "not my truck" thread that's related to this one, it's established that the OP is getting a WTS light, and some tach movement.
It hasn't been mentioned here, but in the "not my truck" thread that's related to this one, it's established that the OP is getting a WTS light, and some tach movement.