runs bad when cold
Cargo Master
Joined: Oct 2007
Posts: 2,712
Likes: 107
From: BoCoMo
I want to go ahead and try the easier fixes first as don't know what was done to this truck before I had it, so may as well go ahead and do it. Then, do the injectors after that if still having problems. I'll post back after I finish the easier fixes and will read the codes again and see where we are.
Thanks again for all your responses. I appreciate the help.
Thanks again for all your responses. I appreciate the help.
Cross-Country
Joined: Sep 2009
Posts: 67
Likes: 2
I have a 99 with 270K miles on it. Over the past few months, noticed that when I start it in the morning it idles a little rough. Also, if I don't let the truck warm up for at least 5 minutes, it has problems accelerating. If I let off the gas when it does this and pull over to the side of the road and sit until it warms up, then it runs fine, but if I don't let off the gas and keep trying to accelerate the truck will die and it won't re-start unless I let it sit for a while. These symptoms are worse the colder it is outside. If it's hot outside, it doesn't have this problem.
I have the AE code reader and these are the diagnostic codes i'm getting.
P0472 Exhaust Pressure Sensor Low
P1212 Injector Control Pressure lower than desired
P1247 Turbocharger Boost Pressure Low
P0340 Camshaft Position Sensor A Circuit (Bank1 or Single Sensor)
KOER Cylinder Contribution test
P0284 Cylinder 8 Injector Circuit Contribution/Balance Fault
What do y'all think this might be? Where should I start to try and diagnose this problem. I've searched this forum but haven't had much luck finding a solution. Any suggestions will be greatly appreciated.
I have the AE code reader and these are the diagnostic codes i'm getting.
P0472 Exhaust Pressure Sensor Low
P1212 Injector Control Pressure lower than desired
P1247 Turbocharger Boost Pressure Low
P0340 Camshaft Position Sensor A Circuit (Bank1 or Single Sensor)
KOER Cylinder Contribution test
P0284 Cylinder 8 Injector Circuit Contribution/Balance Fault
What do y'all think this might be? Where should I start to try and diagnose this problem. I've searched this forum but haven't had much luck finding a solution. Any suggestions will be greatly appreciated.
Senior User
Joined: Jan 2013
Posts: 105
Likes: 0
I have the same problem ... Poured some SEAFOAM in the oil fill tube to thin the oil a little to help with cold weather (michigan 20 deg.)
Yes you have to let it warm up! or plug it in..
also I believe the clearance on the poppets is .002 .. not .004 but Im not currently looking at the shop manual .. i know you can shim them to get the clearance -
ill check and re-post
Yes you have to let it warm up! or plug it in..
also I believe the clearance on the poppets is .002 .. not .004 but Im not currently looking at the shop manual .. i know you can shim them to get the clearance -
ill check and re-post
Post Fiend
Joined: Dec 2009
Posts: 15,505
Likes: 18
From: Livoina,La
I have the same problem ... Poured some SEAFOAM in the oil fill tube to thin the oil a little to help with cold weather (michigan 20 deg.)
Yes you have to let it warm up! or plug it in..
also I believe the clearance on the poppets is .002 .. not .004 but Im not currently looking at the shop manual .. i know you can shim them to get the clearance -
ill check and re-post
Yes you have to let it warm up! or plug it in..
also I believe the clearance on the poppets is .002 .. not .004 but Im not currently looking at the shop manual .. i know you can shim them to get the clearance -
ill check and re-post
Post Fiend
Joined: Dec 2009
Posts: 15,505
Likes: 18
From: Livoina,La
Thread Starter
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Junior User
Joined: Mar 2011
Posts: 91
Likes: 0
From: Pensacola, FL
I finally got around to trying to figure out this problem and it was a simple fix. I was real low on oil. Changed the oil and filter and it runs fine now. I may have an oil leak somewhere.
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