Hard start today.

[DieselSlug]

Yesturday the truck didnt want to start, well i mean run... It was not plugged in and the temp was about 19 degrees. I hit the key and let it glow, it started chugged real rough and died. The next few times i hit the key it turned over and skipped a couple times trying to take off but wouldnt. THen i hit the key and tapped the accelerator a few times and it started rough, ran rough for a min or so and was fine. Today it did the same thing but a little worse. I plugged it in for an hour this morning before i started it, but it still did not want to start. Everytime i park it for a couple hours it will start but almost die, not miss like its waiting for a cylinder to get warmed up, but die like its running out of fuel. But it wont completely die it will pivk right back up and stay idleing. All of this has only happened when it is cold. The plugs are duraterms and all have power to them but i have not ohmed them out yet. I want them to glow longer, but i want to wait untill i get the heath chip. (dont like splicing wires...) But it has always fired right off up untill the other day. It usually runs rough for a min but starts and stays running. So it seems like its running out of fuel to me. SInce it would start for a second but then die. The tank was filled 2 days ago and should have some left over power service in it from the half tank before. But could the fuel be gelling? Could the heater in the fuel manager be going? I have let the WIF spout drain into a cup while running and it didnt die. Just putting this thread out for ideas. Let me know, thanks!

 

[540s10]

unplug the coolant temp sensor and see what happens, also try unplugging the air temp sensor not at the same time though.

make sure the plugs are working as well, my relay and everything works, but im sure the glowplugs arent doing anything because it starts the same whether i wait for the light or just crank it.

 

[DieselSlug]

What would unplugging the temp sensor and the air sensor do? Just curious so i know what the truck is thinking and what i need to expect it to do (right and wrong) Thanks!

 

[540s10]

its possible the coolant temp sensor is reading incorrect and telling the computer to give you wrong amount of cold start fuel and timing advance.. unplugging it forces the ecu to use the coldest adjustments possible which would make it start better if the sensor doesn't work...

I would try the air temp sensor as well because the ecu may have something built in that ignores the coolant temp if the intake temps are too high.

 

[DieselSlug]

I will try this tomorrow morning and report back tomorrow night. Thanks! Any other advice greatly appreciated!

 

[ak diesel driver]

Weren't you concerned about some smoke awhile back when starting?

 

[DieselSlug]

Yes i was, it still smokes a bit, i havent figured it out yet. All gp's checked good and previous owner (and another member) of my injectors (said to have 5-10k on them)said they did not smoke on start up. So i am taking his word. I am confused on that issue. Kinda getting burned out, stressed with all the issues adding up after i put 4k into this engine leaving me spending more each week that i dont have. School and work leave me almost no time, ive been outside in the snow late at night freezing trying to figure out what the hell is wrong with this thing. Sorry, had to vent a little i guess...

 

[iamdave0887]

I still vote for injectors.

The ones i got from Kenny are starting to have Leakdown problems now, but they also have 160K+ on them. My blazer starts and sputters and coughs smoke on a cold start now(it's been 20*F and colder all week and was 10*F this morning), just like what your describing. Either that or my 60Gs aren't glowing long enough but even with the override i find myself giving the truck about 10 seconds of extra glow time and it still sputters and runs rough for a bit.

My pickup did the same when it's injectors began to have leakdown issues.

 

[DieselSlug]

I still vote for injectors.

The ones i got from Kenny are starting to have Leakdown problems now, but they also have 160K+ on them. My blazer starts and sputters and coughs smoke on a cold start now(it's been 20*F and colder all week and was 10*F this morning), just like what your describing. Either that or my 60Gs aren't glowing long enough but even with the override i find myself giving the truck about 10 seconds of extra glow time and it still sputters and runs rough for a bit.

My pickup did the same when it's injectors began to have leakdown issues.

I wont have money for a while, but when i get some i will replace the injectors just because i am getting scared of ruining pistons i just replaced. Let me tell you if its the injectors i will be on FIRE!!!! Paid good money for them.....

 

[iamdave0887]

I wont have money for a while, but when i get some i will replace the injectors just because i am getting scared of ruining pistons i just replaced. Let me tell you if its the injectors i will be on FIRE!!!! Paid good money for them.....

You could try the CTS trick that has been suggested. if it starts better with no smoke then it's a glow related issue. If not well....

 

[bison]

Do you got pedal control right after cold start up?

 

[DieselSlug]

When it does this not want to start thing the only way i can get it to fire off and stay running is to tap the throttle a bunch of times while turning it over, and continuing to keep it running. So there is 100% throttle response.

 

[iamdave0887]

I didn't think the pedal had any effect until after the engine was running. Learn something new every day. I know in the DB2 IPs it does have an effect as your physically moving the metering valve in the Ip when you hit the "go" pedal.

 

[ak diesel driver]

I know on mine which ,had the same symptoms, it helps to start with about 3/4 throttle and let off real quick so you don't over rev it. Mine is an ip problem I believe the advance parts in the ip have wear marks or scores if you will it helped a bunch to run 1 quart of nd 30 wt per tank. Almost made my symptoms go away.

 

[Brooklyn Tow]

Back to basics...Try the CTS first, it may just be a timing issue.

2 Cents

 

[bison]

I know on mine which ,had the same symptoms, it helps to start with about 3/4 throttle and let off real quick so you don't over rev it. Mine is an ip problem I believe the advance parts in the ip have wear marks or scores if you will it helped a bunch to run 1 quart of nd 30 wt per tank. Almost made my symptoms go away.

That i think is my prob too. sticky advance,worse the colder it gets. not so bad now after adding conditioner and 2 stroke oil to the fuel.

 

[DieselSlug]

Will power service suffice for the 2 stroke? Getting ready to go to work now, i will report back tonight.

 

[ak diesel driver]

My understanding is it doesn't have as much lubricity which is what your looking for

 

[iamdave0887]

Will power service suffice for the 2 stroke? Getting ready to go to work now, i will report back tonight.

I usually use both at the same time. The power service to fight fuel gelling and such, and the 2-stroke for lubricity.

 

[DieselSlug]

Ok, i didnt unplug the cts this morning just to see if the problem was still persisting. The truck fired right up like normal. The only thing i did was poured 1/4 gallon of p/s in the tank last night. Then this afternoon i started the truck up at 6pm after sitting since 9 am. It fired right off and actually didnt hardly smoke, maybe just a little puff. Still dont know whats quite going on here, guess i will keep hard tabs on it over the next few days. I am starting a list of things it needs when i get paid from the last roof job i had. I will keep everyone posted on the next days events!