oem part numbers ?
#1
oem part numbers ?
Hey everyone does anyone know where i can find a list of oem part numbers ? I have a 88 f150 351 efi. I am having to replace my crankshaft position sensor and nobody seems to have it or ever heard of it. The guys at the ford dealer have no effin clue lol and said if i could give them a part number then they could find it. Thanks in advance
#2
#3
Your truck does not have a crankshaft position sensor that is why no one can find a part number. The only thing that "implies" where the crankshaft position is at is the reluctor that triggers the PIP sensor in the distributor.
What issue are you having and trying to resolve?
What issue are you having and trying to resolve?
#4
You really need to get your truck back. Start with the basics, check fuel pressure, you say you spark but where did you check and what color is it? orange, blue.etc. The ignition control module is a common failure, but you usually do not get any spark when it fails. A bad PIP can also be another contributor. The ICM can be removed and tested. A cheap fuel pressure gauge will tell you if you have the correct fuel pressure.
#6
#7
Trending Topics
#8
The PCM is not really a high failure item. I would take the ICM off then have it tested. One other thought, try disconnecting the MAP sensor, then see if it starts. Now that you have left the truck with someone else I would also verify the timing is correct.
Please quantify "I have correct fuel pressure".
Please quantify "I have correct fuel pressure".
#10
#12
When the throttle goes to maximum signal the PCM will disable the fuel injectors when trying to start the vehicle. This is a built-in feature. Which brings up a good point. Now that you have verified you have spark and what appears to be good fuel pressure the next item is checking to see if the injectors are being told to turn on.
A test light is your best bet here. Attach it to an injector plug, crank over the engine, see if the test light flashes. If not then you know your issue is injector firing. I have seen a PIP or two cause this problem. The PIP is used to trigger both the spark and the injector firing by way of the PCM. The PCM uses the PIP signal as the trigger point for the injectors. I have seen a few cases where there is spark, but no injector triggering pulses from the PCM.
+12VDC is sent from the load side of the PCM relay to the injectors. The return is supplied through the PCM via pins 58 and 59. If the +12VDC is missing or a break in the wiring to the PCM the injectors will not trigger on.
Another quick check is to disconnect the TPS sensor. If the VREF signal has shorted to the signal output the PCM will think the throttle pedal is at maximum (floored) therefore it will not trigger the injectors.
A test light is your best bet here. Attach it to an injector plug, crank over the engine, see if the test light flashes. If not then you know your issue is injector firing. I have seen a PIP or two cause this problem. The PIP is used to trigger both the spark and the injector firing by way of the PCM. The PCM uses the PIP signal as the trigger point for the injectors. I have seen a few cases where there is spark, but no injector triggering pulses from the PCM.
+12VDC is sent from the load side of the PCM relay to the injectors. The return is supplied through the PCM via pins 58 and 59. If the +12VDC is missing or a break in the wiring to the PCM the injectors will not trigger on.
Another quick check is to disconnect the TPS sensor. If the VREF signal has shorted to the signal output the PCM will think the throttle pedal is at maximum (floored) therefore it will not trigger the injectors.
Thread
Thread Starter
Forum
Replies
Last Post
BigBully
1987 - 1996 F150 & Larger F-Series Trucks
2
10-30-2006 12:41 AM