2000 cold start issue

Jomax · Jan 10, 2016

Short Bus said:
I have verified that there is no hpo until it fires and that the res is low. If the batteries hold out it will start. Or ether and it fires right off. glow plugs are operating, glowplug relay is operating and new injectors last year.

You couldn't gotten that bad batch of orings.

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Magnum PD · Jan 10, 2016

As long as the HPOP has oil to pump, it should start building pressure right? Or does it need pressure from the LPOP to get pressure going on the high pressure pump?

ToMang07 · Jan 10, 2016

Magnum PD said:
As long as the HPOP has oil to pump, it should start building pressure right? Or does it need pressure from the LPOP to get pressure going on the high pressure pump?

LPOP feeds the HPOP Res, where the HPOP gets oil from.

psduser1 · Jan 10, 2016

The rez should have enough oil to fire the injectors a couple of times, "ish". Of course, while the engine is rolling over, the lpop is building pressure and refilling the rez. Barring a large leak, of course.

Short Bus · Jan 11, 2016

Thats what i thought, I figured it would at least try to fire off since the res is 75% or better full. but there's no smoke no nothing. I am going to pull it into the shop here shortly and put an oil pressure gauge down by teh oil cooler and also hook up a fuel pressure gauge to the pass side head. I may also swap in an IPR just maybe that old ipr is getting sticky or the coil is getting weak.

Magnum PD · Jan 11, 2016

Be a good start.

Dirtclod · Jan 11, 2016

That's what mine was doing except it acted like no compression. I'll call the guy and find out what exactly was wrong

Short Bus · Jan 12, 2016

Installed gauges on the truck yesterday. there's 50ish psi of oil at the oil cooler when cranking or idling cold. fuel pressure is good... Swapped in a brand new ipr i had laying in the tool box, we have icp now but still no cold start. As soon as i hooked up jumper cables and cycled the glow plugs again it fired right off. would the pcm or idm be cutting out due to low voltage? If so how would one go about narrowing down which one?

Dirtclod · Jan 12, 2016

I'm not an mechanic by any means,but my experience tells me you need 14.5 volts to crank. Gloplugs take up over 2. Search this forum for a thread on batteries. Some guy had a good write up. I keep a trickle charger on mine and plug it often to charge.

Bluke · Jan 12, 2016

The pcm cuts out at 10.5v. You need to have your batteries load tested and ensure you have good battery cables.

ToMang07 · Jan 12, 2016

Bluke said:
The pcm cuts out at 10.5v. You need to have your batteries load tested and ensure you have good battery cables.

Correct, 10.5v or less and it won't even fire the injectors.

Short Bus · Jan 12, 2016

this thing is going to get blown up. wouldnt start, walk away for 5 minutes crank again and it starts..... disconnected batteries, tested... both passed. came back 5 minutes later no start, hooked up jumpers fired right up. truck dies and wont start 5 times, 6th it fires up and runs great. cables dont look bad, connections are tight, checked battery grounds on engine, engine to cab, etc. all looks good. just random ****ing no starts. Hit it with ether or jumpers and it fires right up. wtf.

ToMang07 · Jan 12, 2016

Short Bus said:
this thing is going to get blown up. wouldnt start, walk away for 5 minutes crank again and it starts..... disconnected batteries, tested... both passed. came back 5 minutes later no start, hooked up jumpers fired right up. truck dies and wont start 5 times, 6th it fires up and runs great. cables dont look bad, connections are tight, checked battery grounds on engine, engine to cab, etc. all looks good. just random ****ing no starts. Hit it with ether or jumpers and it fires right up. wtf.

Do you have a second set of good batteries you can swap in to try?

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Short Bus · Jan 12, 2016

I shouldn't have said jumpers always start it, only seems to help. It was so dead once today that it barely cranked came back later relays were clicking in and out it was so low on voltage and it started. Let it run or charge for 30-45 min and won't start the next 3 tries. Ether always starts it, just don't know what the hell is going on. Almost tempted to find a used pcm and idm.

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TyCorr · Jan 12, 2016

No codes?

Bustedknuckles · Jan 12, 2016

Whats the scanner show for rpm while its cranking? Could be a bad crank sensor and the pcm is seeing enough rpm to start firing. I've seen it happen

lincolnlocker · Jan 13, 2016

what is voltage after 30 min of idle? if it is starting more often with jumpers hooked up then i woukd dare say its partially a voltage issue.. all connections are clean at batteries and starter?

please stop using ether

live life full throttle

god bless america and the farmer who feeds your fat ass

Dirtclod · Jan 13, 2016

Could IDM wiring harness have shorts on it?

Dirtclod · Jan 13, 2016

In it? Lol!

Short Bus · Jan 13, 2016

swapped in a new ford cps because it did have an intermittent cps fault code. I think the rpm while cranking is 140-150 iirc. Once the glow plugs kick off the system voltage is 13.5-14 depending on the rpm. With the glow plugs cycling engine running the voltage is 12-12.5. Could the starter be the issue, drawing too many amps? There was a time yesterday teh voltage dipped low enough my scanner lost connection while cranking. That was when i came back 5 minutes later and it fired right up after cycling the gp's.