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My basket case of an F150 is starting to come along nicely. It looks that I’ve figured out my vacuum line routing, though some will have to be replaced.
my issue now is I have a connector on the manifold side of the engine on my 94 4.9L. Any help with what it connect to would be appreciated.
That is the connector for the Vapor canister purge that has a vacuum line attached to it going to the vapor canister and the PCV. on my 7.5. Yours may connect somewhere other than the PCV on the 4.9.
That is the connector for the Vapor canister purge that has a vacuum line attached to it going to the vapor canister and the PCV.
Where is the sensor located? I ask because I traced the vacuum from the PCV valve to the intake manifold and don’t see a sensor. I’m wondering if it is yet another item that is missing from this truck.
Where is the sensor located? I ask because I traced the vacuum from the PCV valve to the intake manifold and don’t see a sensor. I’m wondering if it is yet another item that is missing from this truck.
I just put a pic on my post of the purge sensor. And reworded where it may connect on your 4.9
If the connector is just hanging there like in your pic then it is missing, If you have the vacuum hose there then you can cut it and install the solenoid. At least that is how mine is on the 7.5 motor
It looks like I won’t even have to cut the vacuum line. From what it looks like to me someone just removed it and put a piece of plastic tubing in its place.
What happens if you don't replace canister purge valve?
If the canister purge valve is stuck open, a vacuum leak forms and your car's engine can be adversely impacted. Air will get in the engine in an unpredictable quantity, so your car's computer will react. The car's air to fuel ratio will be changed, which leads to rough idling and difficult starts.
What happens if you don't replace canister purge valve?
If the canister purge valve is stuck open, a vacuum leak forms and your car's engine can be adversely impacted. Air will get in the engine in an unpredictable quantity, so your car's computer will react. The car's air to fuel ratio will be changed, which leads to rough idling and difficult starts.
You have these symptoms?
I don’t know. I got the truck over the Christmas holiday from my father-in-law. It had been sitting at a shop for at around 18 months because of a supposed blown head gasket. The mechanic who was working on it got fired for stealing things and promising unrealistic quotes and then changing the amount once the work had already been done.
I’m trying to get everything attached again to start it and try and diagnose things myself. The biggest issue so far is the ECM was likely stolen. I have another thread trying to determine the correct ECM to purchase. Then with the distributor, coil, plugs and wires I will hopefully be able to start it again.
I don’t know. I got the truck over the Christmas holiday from my father-in-law. It had been sitting at a shop for at around 18 months because of a supposed blown head gasket. The mechanic who was working on it got fired for stealing things and promising unrealistic quotes and then changing the amount once the work had already been done.
I’m trying to get everything attached again to start it and try and diagnose things myself. The biggest issue so far is the ECM was likely stolen. I have another thread trying to determine the correct ECM to purchase. Then with the distributor, coil, plugs and wires I will hopefully be able to start it again.
Have you checked the oil for coolant being present which is a symptom of a blown head gasket? I would do that before buying a PCM. Do you know if the PCM/ECM is missing for sure?
There is a gasket with rubber that goes between the connector and the firewall. It is to prevent moisture intrusion. You will need it. It is hard to imagine the crook throwing the PCM away or stealing it as its use is VERY limited. Can you look around the shop for it and the gasket?
There is a gasket with rubber that goes between the connector and the firewall. It is to prevent moisture intrusion. You will need it. It is hard to imagine the crook throwing the PCM away or stealing it as its use is VERY limited. Can you look around the shop for it and the gasket?
unfortunately I can’t look around the shop. I’m just south of Richmond, VA and the shop is near Chattanooga, TN. Originally it was just a hole without the gasket. I found the gasket in the truck bed and the nuts were in a coffee can inside the engine compartment. The cab and bed are clean now and I have put things back where they go if I have them I’m my possession. The distributor, ignition coil, spark plugs and plug wires are all missing as well.
I say theft is most likely because the truck was driving when the engine died and they had it towed to the shop about a year and a half ago.
At this point, regardless of the reason they are missing, I have to replace them before I can try and start the truck and diagnose what is actually wrong with it.
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