Injectors
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Mountain Pass
Joined: Jun 2008
Posts: 238
Likes: 2
From: Central Mississippi
Injectors
2000 F-450 7.3 130,000 miles.
Had diagnostic done and said #1 and #8 injectors are bad. It is definetly running with a little chugga chugga.
I have several weeks of work to do before i can schedule and budget replacing these injectors. Have been told running the truck with the bad injectors will not do any further damage to the motor or anything else.
What do you think?? Should i go ahead and have them replaced or will running the truck for couple of weeks be OK???
Had diagnostic done and said #1 and #8 injectors are bad. It is definetly running with a little chugga chugga.
I have several weeks of work to do before i can schedule and budget replacing these injectors. Have been told running the truck with the bad injectors will not do any further damage to the motor or anything else.
What do you think?? Should i go ahead and have them replaced or will running the truck for couple of weeks be OK???
Thread Starter
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Mountain Pass
Joined: Jun 2008
Posts: 238
Likes: 2
From: Central Mississippi
Shop also said once he start he could find out its electrical comming from harness under valve covers maybe.
The miss i get is continious. Its a bucket truck and the bucket uses hydraulic pump run off of motor. Whie its idiling and i'm working in bucket i can feel the steady shake shake chugg chugg steady.
Thanks for your input.
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Mountain Pass
Joined: Jun 2008
Posts: 238
Likes: 2
From: Central Mississippi
Thanks I will share this with my mechanic. Yes i had the CPS replaced this year in the spring.
Hopefully he will find the correct problem when he gets my truck.
So running my truck will not do any further damage or can you say without knowing the real problem?
Hopefully he will find the correct problem when he gets my truck.
So running my truck will not do any further damage or can you say without knowing the real problem?
Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
I drove 700 miles on two bad holes... while getting 18.5 MPG. These things are tougher than I gave them credit for.
#1 and #8 are both last in line on their fuel ports... air in fuel can cause this, as well as a number of other things.
Can you print out that last link in the signature and take it to your mechanic?
#1 and #8 are both last in line on their fuel ports... air in fuel can cause this, as well as a number of other things.
Can you print out that last link in the signature and take it to your mechanic?
Thread Starter
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Mountain Pass
Joined: Jun 2008
Posts: 238
Likes: 2
From: Central Mississippi
I drove 700 miles on two bad holes... while getting 18.5 MPG. These things are tougher than I gave them credit for.
#1 and #8 are both last in line on their fuel ports... air in fuel can cause this, as well as a number of other things.
Can you print out that last link in the signature and take it to your mechanic?
#1 and #8 are both last in line on their fuel ports... air in fuel can cause this, as well as a number of other things.
Can you print out that last link in the signature and take it to your mechanic?
When we added fuel back to tank we did not prime it properly. Took forever to get it cranked, ran batteries down, new batteries, and burned up a starter, lifetime warranty thank goodness, trying to get it cranked.
Finally got it started by priming the fuel bowl with the top of bowl off to let air escape from bowl and system. Has had that chugga chugga ever since.
18mpg what a dream of mine. I average 8mpg if that good. I have a 16,000lb GVWR. with the boom and all my tools and supplies I'm carrying 13,500lb plus full time. 10mpg would be great for me.
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Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
That much air? It's possible you have a cracked nozzle or two, but it's more likely you still have an air thing going on. Did you do the full-"blown" Hutch mod, including removing those cursed quick-disconnects?
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Thread Starter
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Mountain Pass
Joined: Jun 2008
Posts: 238
Likes: 2
From: Central Mississippi
Maybe some of that gunk is on screen at fuel pump under drivers door. Dont think that would cause the chugga chug tho??
Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
I'd really investigate air or debris in fuel because you disturbed the system when you cleaned the tank and those quick-disconnects leak bad. You can open the end fuel ports near #1 and #8 and cycle the fuel pump (it makes a real mess) to clear the lines.
Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
When we added fuel back to tank we did not prime it properly. Took forever to get it cranked, ran batteries down, new batteries, and burned up a starter, lifetime warranty thank goodness, trying to get it cranked.
Finally got it started by priming the fuel bowl with the top of bowl off to let air escape from bowl and system. Has had that chugga chugga ever since.
Finally got it started by priming the fuel bowl with the top of bowl off to let air escape from bowl and system. Has had that chugga chugga ever since.
Thread Starter
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Mountain Pass
Joined: Jun 2008
Posts: 238
Likes: 2
From: Central Mississippi
The proper way to prime the fuel system on these trucks is to just run the fuel pump without cranking the engine. Much easier on your batteries. Key on engine off will run the fuel pump for about 20 seconds. When you hear pump stop turn key to off and then back on and pump will run again for about 20 seconds. Let the pump cycle 3 or 4 times and it should start right up, although it will run rough and noisy for a couple of minutes it will smooth out.
Cranking it beforei cycled the fuel pump correctly i guess forced air into the fuel system??
Tried and tried to crank it again with no sucess. Like i said the batteries ran down and the starter burned out trying to crank it. After new starter put on still didnt crank. We finally primed the fuel bowl with the top off of it. Then it finally cranked.
Have had the chugga chugga ever since. Its not severe, you can just tell its not running properly.
I learned my lesson. Thanks for your input and advice.
Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
Thats what i didnt do. I think i let the fuel pump cycle once then cranked it. It sounded so bad it worried me and i turned the key off. Mechanic said i should have left it running it would have cleared up. After that I cycled the fuel pump several times but it never would crank.
Cranking it beforei cycled the fuel pump correctly i guess forced air into the fuel system??
Tried and tried to crank it again with no sucess. Like i said the batteries ran down and the starter burned out trying to crank it. After new starter put on still didnt crank. We finally primed the fuel bowl with the top off of it. Then it finally cranked.
Have had the chugga chugga ever since. Its not severe, you can just tell its not running properly.
I learned my lesson. Thanks for your input and advice.
Cranking it beforei cycled the fuel pump correctly i guess forced air into the fuel system??
Tried and tried to crank it again with no sucess. Like i said the batteries ran down and the starter burned out trying to crank it. After new starter put on still didnt crank. We finally primed the fuel bowl with the top off of it. Then it finally cranked.
Have had the chugga chugga ever since. Its not severe, you can just tell its not running properly.
I learned my lesson. Thanks for your input and advice.
Low voltage while cranking will also damage the starter. The starter will crank the engine over with only 9 volts but the low voltage causes extreme heat to build up in the starter.
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