7.3 IDI idiling problems
Thread Starter
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Mountain Pass
Joined: Oct 2008
Posts: 128
Likes: 1
7.3 IDI idiling problems
1988 f350 4x4 with 7.3 IDI. It seems to have stopped having the problem of sticking while cranking and starting but now it wants to shut off when braking or with medium to hard accelerating. Then it cranks but doesn't want to restart.
WTF? Thanks for the help.
WTF? Thanks for the help.
Post Fiend
Joined: Nov 2004
Posts: 5,638
Likes: 1
From: Manitoba
Could be a couple things........ low fuel pressure
Do a pressure and flow test of the fuel pump at the Schrader valve on the filter header (FSS- fuel shutoff solenoid disconnected on IP). Remove the tire valve core and hook a hose and pressure guage on it should see 4-6 psi when starter cranking engine over. Then do a fuel quantity test same place, should see 1/3 pint in 10 seconds of starter engine cranking, route fuel to a suitable container with a hose. When all finished hook up the FSS wire .
OR
The IP is going bad, if it is worn out it will have very hard starting hot..... starts ok cold.
If it stalls on turning corners, hard braking or pushing the clutch in it could be rusty internals. There is a TSB 94-5-11 explaining the problem and possible repair. If you would like the TSB click on my name, email me and and use Subject: IP TSB.
Do a pressure and flow test of the fuel pump at the Schrader valve on the filter header (FSS- fuel shutoff solenoid disconnected on IP). Remove the tire valve core and hook a hose and pressure guage on it should see 4-6 psi when starter cranking engine over. Then do a fuel quantity test same place, should see 1/3 pint in 10 seconds of starter engine cranking, route fuel to a suitable container with a hose. When all finished hook up the FSS wire .
OR
The IP is going bad, if it is worn out it will have very hard starting hot..... starts ok cold.
If it stalls on turning corners, hard braking or pushing the clutch in it could be rusty internals. There is a TSB 94-5-11 explaining the problem and possible repair. If you would like the TSB click on my name, email me and and use Subject: IP TSB.
Thread Starter
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Mountain Pass
Joined: Oct 2008
Posts: 128
Likes: 1
I was pricing injector pumps and only two places even carried them. One wanted $550 (Ford) and the other $715 (Autozone). Who else carries these and won't charge me more than I paid for the truck?
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 15
From: Nutter Fort, WV
35 dollars is the lift pump.
550 or 715 is the injection pump.
7.3 L Ford Diesel Fuel Injectors Fuel Pumps Accessories
399.61
Several members have also had good luck with Pensacola Fuel Injection, I don't have that web address though.
550 or 715 is the injection pump.
7.3 L Ford Diesel Fuel Injectors Fuel Pumps Accessories
399.61
Several members have also had good luck with Pensacola Fuel Injection, I don't have that web address though.
Posting Guru
Joined: Oct 2005
Posts: 1,030
Likes: 0
From: Powell River B.C.
Several vendors online- ebay-sell reconditioned Injector pumps for as little as $265 plus core charge. I've been running one for 2 years now with no problems.
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Postmaster
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