gnxtc2
Active member
So I get a call to help a 17 year old kid to start his '96 7.3.
Background:
He parks his truck to fix the driver's window. The window got stuck in the down position. So he begins to jump wires on the window switch to diagnosis if it's a bad window motor or switch. He shorts some wires until he finally finds the correct wires. He is able to get the window. So he tries to start the truck and it doesn't start.
The kid changes the fuel pump (mechanical). While doing the fuel pump, he replaces the drain valve on the fuel bowl. Don't know why. Still doesn't start.
I get a call from a friend to ask me why the truck doesn't start. I tell him what is the ICP and fuel pressure? I get no answers as they have no way of telling.
I go over the house. Plug the scanner in and the ICP is 0 and no smoke out the tailpipe. I get cranking rpm of 125. Find that the tin nut on the IPR was loose. I have no tools with me to fix it but use a screwdriver to "tighten" the nut. I get a ICP reading of 1500. Try starting and the batteries die. Tell the kid to charge the batteries as he only has a homeowner type charger and to call me later.
The kid asks another friend to help him as he can't wait for me. So they decide to change the IPR and ICP sensor for unknown reason(s). He tries to start the truck and it would start. They shoot it with ether and the motor backfires. The kids ears are ringing from the backfire.
ointlaugh: I wish I was there for that. Thinking to myself,drained the HPOP reservoir and didn't fill it.
He tows the truck to my friend's shop. My friend has no idea on how to work on diesels. So I go to his shop. Atleast he has the proper tools. I scan the truck again.
Cranking ICP I get 0. Check the reservior, empty. Put about a quart of oil in.
Cranking ICP now is 3500....WTF???? That reading is not correct. Hook up my mechanical gauge to the head. Cranking ICP is 1500-2000. Check the ICP sensor, the connector is cracked. I unplug the senor to put it into default and it still doesn't start. No white smoke out the tailpipe. WTF???
Do a buzz test and it passes. Externally check valve cover gaskets and no burnt pins. Removed chip from ECM.
Check fuel pressure 30 psi....marginal. I open the drain valve on the fuel bowl. No fuel is coming out. I start loosening the the filter cap, and fuel comes pouring out the drain. I attempt to close the drain and it does stop. Apparently he put the drain in wrong, the clocking. I look at the cap. The cap doesn't have the tabs to hold the filter in. The filter is jammed into the cap. I have to pry the filter out the cap. I leave the filter out temporarily, put the cap back on and play with the drain to close it. I try to start....nothing. This time, I'm getting white smoke out the tail pipe. So I ordered another cap for the truck.
I jump the GPR. Put the jumper cable from the positive battery post to the GP post on the relay. Now I try to start it, it wants to fire but doesn't. Then the batteries die.
I have ICP and fuel (white smoke) but doesn't start.
Would the motor run with a filter in the bowl?
Billy T.
[email protected]
Background:
He parks his truck to fix the driver's window. The window got stuck in the down position. So he begins to jump wires on the window switch to diagnosis if it's a bad window motor or switch. He shorts some wires until he finally finds the correct wires. He is able to get the window. So he tries to start the truck and it doesn't start.
The kid changes the fuel pump (mechanical). While doing the fuel pump, he replaces the drain valve on the fuel bowl. Don't know why. Still doesn't start.
I get a call from a friend to ask me why the truck doesn't start. I tell him what is the ICP and fuel pressure? I get no answers as they have no way of telling.
I go over the house. Plug the scanner in and the ICP is 0 and no smoke out the tailpipe. I get cranking rpm of 125. Find that the tin nut on the IPR was loose. I have no tools with me to fix it but use a screwdriver to "tighten" the nut. I get a ICP reading of 1500. Try starting and the batteries die. Tell the kid to charge the batteries as he only has a homeowner type charger and to call me later.
The kid asks another friend to help him as he can't wait for me. So they decide to change the IPR and ICP sensor for unknown reason(s). He tries to start the truck and it would start. They shoot it with ether and the motor backfires. The kids ears are ringing from the backfire.
ointlaugh: I wish I was there for that. Thinking to myself,drained the HPOP reservoir and didn't fill it.He tows the truck to my friend's shop. My friend has no idea on how to work on diesels. So I go to his shop. Atleast he has the proper tools. I scan the truck again.
Cranking ICP I get 0. Check the reservior, empty. Put about a quart of oil in.
Cranking ICP now is 3500....WTF???? That reading is not correct. Hook up my mechanical gauge to the head. Cranking ICP is 1500-2000. Check the ICP sensor, the connector is cracked. I unplug the senor to put it into default and it still doesn't start. No white smoke out the tailpipe. WTF???
Do a buzz test and it passes. Externally check valve cover gaskets and no burnt pins. Removed chip from ECM.
Check fuel pressure 30 psi....marginal. I open the drain valve on the fuel bowl. No fuel is coming out. I start loosening the the filter cap, and fuel comes pouring out the drain. I attempt to close the drain and it does stop. Apparently he put the drain in wrong, the clocking. I look at the cap. The cap doesn't have the tabs to hold the filter in. The filter is jammed into the cap. I have to pry the filter out the cap. I leave the filter out temporarily, put the cap back on and play with the drain to close it. I try to start....nothing. This time, I'm getting white smoke out the tail pipe. So I ordered another cap for the truck.
I jump the GPR. Put the jumper cable from the positive battery post to the GP post on the relay. Now I try to start it, it wants to fire but doesn't. Then the batteries die.
I have ICP and fuel (white smoke) but doesn't start.
Would the motor run with a filter in the bowl?
Billy T.
[email protected]
