Recently purchased a 98.5 24v for cheap. Previous owner said it needed an injection pump. After putting a new injection pump and lift pump on it still doesn’t start. Bleed the fuel system till fuel was coming out of all injector lines. Checked for codes and there are no codes. After still not starting tried Starting truck with either(I know it’s not good on them but wanted to see if it would run). It did start and run off of either but immediately died after we stopped spraying either. Checked the oil and found a good amount of diesel in the oil. Does this mean injectors are leaking and we need to replace them?
98.5 Crank but no start
-
March's Cummins of the Month challenge is now open for entries!
1 - 12 of 12 Posts
Joined
·
26,174 Posts
Welcome. Maybe injectors or crossover tubes. Need more info. Tell us about truck in signatiure, eveything, Year, model, 4x4? trani, mods, miles, other reparis?
Did you bleed to spray out around fittings when cranking?
Does tach move during cranking to about 200?
Does wait to start light cone on for at least a second every time you turn the key to ON?
Are you pulling codes with a scan tool?
First Charge batteries to full charge before more work other than rebleeding..Crack 1.3,4 and crank in 10 second intervals and 3-60 seocnd rest breaks on starter. Do at leasst 10 sets. Look for spray, not dribble.
Where did you buy the injection pump?
Ps I will be off line this afternoon. Answer above and rebleed and charge and get back.
Did you bleed to spray out around fittings when cranking?
Does tach move during cranking to about 200?
Does wait to start light cone on for at least a second every time you turn the key to ON?
Are you pulling codes with a scan tool?
First Charge batteries to full charge before more work other than rebleeding..Crack 1.3,4 and crank in 10 second intervals and 3-60 seocnd rest breaks on starter. Do at leasst 10 sets. Look for spray, not dribble.
Where did you buy the injection pump?
Ps I will be off line this afternoon. Answer above and rebleed and charge and get back.
Truck is a 1998.5 2500 automatic 4x4 truck is completely stock and has 163,000 miles. It was sitting in a field for about 5 years. We charged batteries fully and then bled till fuel was spraying out of all fittings. Tach moves to 200 when cranking. Wait to start light comes on. Yes we pulled codes with a scanner and there were no codes and there is no check engine light. I did buy the injection pump off of Facebook marketplace but it came off of a running and driving truck. The guy I bought it from decided to go to a ppump instead of a vp pump. We will keep trying to rebleed
Joined
·
26,174 Posts
Sounds like everything (almost) is as it should be. If you have true spray from injector fittings(not dribble) at the head, and they are now closed, and everything else is as you say it should start. I suspect that the 5+year old batteries are not quite up to snuff and not cranking fast enough to start. Disconnect each oneand read voltage. They should be both 12.6v+ and equal and hold it overnight. Maybe charge them some more and jump with another diesel. Have you checked lift pump pressure or good spray at the injection pump when bumping the starter?
Are all battery terminals perfect?
Are all battery terminals perfect?
Battery terminals are a little rough. It currently has 1 year old batteries that I took out of a running truck. I will try charging them overnight on a trickle charger and then i will hook a truck up to it as well to help. I have not checked lift pump pressure but it is a new lift pump. How do you go about checking lift pump pressure?
There's a fitting with a schrader valve down between your vp and the filter. Easiest for a quick check while doing the starter bump. Later you'll be wanting one in the cab so you can monitor it. Google it for the install. Geno's has the fittings. Where is this "new lift pump" located? Can you hear it running? What brand? Battery terminals should be re-done if they're even doubtful. All grounds need to be in good condition, very important. Have you visited Blue Chip Diesel to do the vp hotwire?
The battery terminals are gonna be replaced on Monday when the part store opens. I plan on getting a quadzilla with i quad to be able to monitor that stuff but kinda want to get it runnin first ya know. I’ll check lift pump pressure. The new pump is still on the side of the block. It’s a pump we got off of a running truck. I can hear it running yes
Joined
·
26,174 Posts
On 98.5 there is a 1/8 in port on top ofthe fuel filter you can screw a gauge or hose to one into. Then bump the starter.
Joined
·
1,852 Posts
Have you had the block heater plugged in for at least two hours? (verified it is working)
I am anti big expensive electric pumps, they all fail.
The on-side of block pumps last for about 80K and are much cheaper to replace ( I am on Number three at 270K )
Each to their own, but do verify you have fuel pressure.
I am anti big expensive electric pumps, they all fail.
The on-side of block pumps last for about 80K and are much cheaper to replace ( I am on Number three at 270K )
Each to their own, but do verify you have fuel pressure.
Alright I am currently out of the state so can’t work on it at the moment. When I get back I’ll have a fuel pressure gauge waiting so I can check pressure from the lift pump. I had a set of new injectors and crossover tubes just sitting around so went ahead and put those in and still no starting by just cranking
1 - 12 of 12 Posts
