Getting hard to start,
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More Turbo
Joined: Feb 2004
Posts: 509
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From: Findlay, Il
Getting hard to start,
But it starts. '99 F250 PS. Had code P1670, cleared it. No other codes. Started truck back up and ran KOER test with AE(which I'm not very good with). The code did not come back. It is hard to start plugged in cold or warmed up. I have WTS light and it goes out(glow plugs are original). RPMs are slow to come up (almost starts before it kicks in). Doesn't matter if fuel tank is full or not. Oil level is fine. Batteries are charged and check good. Starter checks out ok. Buzz test was ok. Now when I run KOER do I need to do anything other than hitting the initiate button?
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Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
KOER isn't going to tell you anything.
Do you get smoke out the tailpipe while cranking, or is it just cranking like the batteries are almost dead?
Put a volt meter on one battery and watch to see the voltage drop when the key is turned on, and again when the engine is cranked. Repeat for the other battery. If RPM's are slow, then batteries, cables, connections or the starter is suspect.
Do you get smoke out the tailpipe while cranking, or is it just cranking like the batteries are almost dead?
Put a volt meter on one battery and watch to see the voltage drop when the key is turned on, and again when the engine is cranked. Repeat for the other battery. If RPM's are slow, then batteries, cables, connections or the starter is suspect.
Thread Starter
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More Turbo
Joined: Feb 2004
Posts: 509
Likes: 3
From: Findlay, Il
KOER isn't going to tell you anything.
Put a volt meter on one battery and watch to see the voltage drop when the key is turned on, and again when the engine is cranked. Repeat for the other battery. If RPM's are slow, then batteries, cables, connections or the starter is suspect.
Put a volt meter on one battery and watch to see the voltage drop when the key is turned on, and again when the engine is cranked. Repeat for the other battery. If RPM's are slow, then batteries, cables, connections or the starter is suspect.
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
10 plus with the key / glow plugs on is the lower end of where the truck will still start up without struggling.
If both batteries read that voltage, and the grounds are good and not corroded, then I'd say it's time for new batteries. To confirm, try jump starting with another diesel truck and see if it starts easier. Or if allowed, swap batteries for a minute and try it.
If both batteries read that voltage, and the grounds are good and not corroded, then I'd say it's time for new batteries. To confirm, try jump starting with another diesel truck and see if it starts easier. Or if allowed, swap batteries for a minute and try it.
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More Turbo
Joined: Feb 2004
Posts: 509
Likes: 3
From: Findlay, Il
The 9v plus is with the engine cranking over. Voltage is 12.8 plus KOff
The problem I see is the rpms do not come up until just before the engine fires off.
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More Turbo
Joined: Feb 2004
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From: Findlay, Il
That was with key off, just cranking the engine over, but not starting.
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Post Fiend
Joined: Mar 2007
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From: Texas
Welcome to the wonderful world of electronics that's supposed to make our lives easier.
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