Injectors
Thread Starter
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Senior User
Joined: Aug 2007
Posts: 167
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From: Ogden Utah
Injectors
Hey everyone,
I am having low power issues with my truck and need input.
It is a 96 psd ext cab 4x4, 6 inch lift and 35 inch tires. 3:55 gear ratio.
I am planning on doing a front straight axle swap and change my gear ratio to 4:10. It has 198000 miles and im just wondering when if it is time to change injectors these are the factory injectors. How do I tell if they are working or not? Any help would be great, I hope i gave enough info about the truck.
thanks for the help I have fixed a lot of things on my trucks and saved a lot of money because of this site.
I am having low power issues with my truck and need input.
It is a 96 psd ext cab 4x4, 6 inch lift and 35 inch tires. 3:55 gear ratio.
I am planning on doing a front straight axle swap and change my gear ratio to 4:10. It has 198000 miles and im just wondering when if it is time to change injectors these are the factory injectors. How do I tell if they are working or not? Any help would be great, I hope i gave enough info about the truck.
thanks for the help I have fixed a lot of things on my trucks and saved a lot of money because of this site.
Elder User
Joined: Dec 2008
Posts: 657
Likes: 0
From: Ocala
One of the easiest ways to tell if they are still good, on the solenoid side, is to run a buzz test. It's a computer diagnostic test that fires each colenoid separately with the motor off. Weak ones need to be rebuilt or replaced. Either a mechanic or someone with the correct software can run it for you.
Postmaster
Joined: Jan 2004
Posts: 3,207
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From: Kearney, Nebr
The buzz test is a good indicator to see if they are operating or not. It might be a good idea just to pull one out and see what condition it's in. Most of the time when people replace their injectors it's because the o-rings are shot.
These injectors can definitely last longer than 200k, but there are components inside them that do wear out. A rebuild is fairly cheap in the long run.
What type of power issues are you having?
These injectors can definitely last longer than 200k, but there are components inside them that do wear out. A rebuild is fairly cheap in the long run.
What type of power issues are you having?
PREMIUM SPONSOR
Joined: Sep 2003
Posts: 2,630
Likes: 217
From: North East Ohio
FWIW, IMO Buzz test is useless. My truck passed a buzz test with no injectors in it! 
A Cylinder Contribution Test (CCT) will load the motor and tell you if one or more injectors isn't 'contributing' enough. Might be a place to start.
Does the truck miss at all? Loss of power could be due to plugged nozzles and/or worn internal parts.
From what I have seen, about 95% of the injectors I get through here are between 185k and 225k miles. Seems like they are due for something right around there, maybe a simple overhaul or maybe more parts worn. Especially with the older '94 - '99 trucks.
Let me know if you have any specific questions.
Thanks,
Jim
A Cylinder Contribution Test (CCT) will load the motor and tell you if one or more injectors isn't 'contributing' enough. Might be a place to start.
Does the truck miss at all? Loss of power could be due to plugged nozzles and/or worn internal parts.
From what I have seen, about 95% of the injectors I get through here are between 185k and 225k miles. Seems like they are due for something right around there, maybe a simple overhaul or maybe more parts worn. Especially with the older '94 - '99 trucks.
Let me know if you have any specific questions.
Thanks,
Jim
__________________
'96 7.3 F-350 Reg Cab 4x4 - bought new.
'04 6.0 E-350 custom 4x4
'08 6.4 F-550 Reg Cab 6 spd 4x4
'17 6.7 F-250 KR ccsb 4x4
'96 7.3 F-350 Reg Cab 4x4 - bought new.
'04 6.0 E-350 custom 4x4
'08 6.4 F-550 Reg Cab 6 spd 4x4
'17 6.7 F-250 KR ccsb 4x4
Thread Starter
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Senior User
Joined: Aug 2007
Posts: 167
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From: Ogden Utah
Thanks Guys,
Sorry it took a while to reply but I have been workong out of town and computer access is very limited. To answer one question I feel like my truck doesn't have enough get up and go, meaning it boggs until about 2500 rpms then takes off. I would like to have more out of the hole power. I know it is a little harder with a manual trans vs automatic but I have always felt that a standard trans pulls a heavy load better than a auto. I pull a 32 foot fifth wheel with my atv trailer behind it, weight wise it's about 9500 pounds. It shouldn't be any trouble for this truck but it peggs the egt's real fast. I think an intercooler is in the very near future. Thanks for all the help. I will get my injectors looked at.
Sorry it took a while to reply but I have been workong out of town and computer access is very limited. To answer one question I feel like my truck doesn't have enough get up and go, meaning it boggs until about 2500 rpms then takes off. I would like to have more out of the hole power. I know it is a little harder with a manual trans vs automatic but I have always felt that a standard trans pulls a heavy load better than a auto. I pull a 32 foot fifth wheel with my atv trailer behind it, weight wise it's about 9500 pounds. It shouldn't be any trouble for this truck but it peggs the egt's real fast. I think an intercooler is in the very near future. Thanks for all the help. I will get my injectors looked at.
Lead Driver
Joined: May 2007
Posts: 8,608
Likes: 13
From: Belair md
pulling 10k on 35's with 3.55 gears is the first problem.
what modifications are currently done to the truck?
what modifications are currently done to the truck?
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Elder User
Joined: Jan 2008
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From: indy
do you still have your catalytic converter on it mine was clogged when i first bought mine and it wouldnt hardly do nothin in first gear -but now i cant get traction on most roads after all mods
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Thread Starter
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Senior User
Joined: Aug 2007
Posts: 167
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From: Ogden Utah
I have a 3" down pipe, an EDGE evolution programer, and it is straight piped. I know the 3:55 gears suck and I am currently looking for a straight axle to put under the front end. I already have a 4:10 rear end to put in whenever I find the straight axle to match. Other than that it is stock.