RicM
Junior Member
Got a P2609 code - generic intake heater problem
I'm well versed in electrical work, multi-meters, oscilloscpes, etc.
So...
I checked (and completely removed, cleaned, re-tightened) all connections from batterie to relays and chassis - they were all decent before.
I disconnected the relays and checked each one many many times to be sure they were relaying and not sticking - they were fine.
I measured voltage at all points - all perfect. I measured resistance across the coils of the heater and all was within .1 Ohms - tested many times (without heater connected).
I hate voodoo, but I replaced the relays anyhow - no change. P2609.
I still hate voodoo, but I changed the heater - no change. P2609.
That's all there is to the system: wires, relays, more wires, then the heater. I just decided to let it go and I was going to have the dealer check it out; maybe a bad computer?
Then wifey said that it took three times to start a couple week later. I could not reproduce.
A couple weeks after that, she said it happened again. Again, I could not reproduce.
Out of abundance of caution, I changed the air filter and then the fuel filter. They were probably at the end of their lives anyhow.
But still, I'd not experienced a problem.
When I started the truck after changing the filter, my wife commented that THAT was the sound!
OK! So...then I was hopeful the fuel filter was the trick.
Then it happened to me. Except I could not get the truck to start at all. Frustrated and ready to tow it, I walked away for a couple hours. I kept thinking...Fuel, Air, Spark. I fixed what I could.
So I decided, on a whim, let me re-seat the injector connectors.
OMG! I pulled the first one, and the connector was oily from fuel.
I cleaned it up with contact cleaner and reconnected and bam! Truck started fast and perfectly.
I did the same to the other two connectors, both of which had some leakage inside, but not near as bad as that front one.
I think this was fuel that wicked up from inside, under the valve cover.
But I don't have a lot of experience, so I am not sure if this is one of those things I need to be aware of, or if it's time to get something replaced, or what?
Oh yeah, that code went way the first time I started the truck after cleaning that connector too.
I put a lot of detail because I've been chasing this one down for a long time, and I spent a fait bit of money replacing good parts. So if someone ever searched P2609, they'll have one more thing to check.
In some of the images I found of the engine, those parts are C115-117.
Is that fuel wicking in a sign of something I need to address (beyond knowing and checking it once in a while)?
Thanks!
I'm well versed in electrical work, multi-meters, oscilloscpes, etc.
So...
I checked (and completely removed, cleaned, re-tightened) all connections from batterie to relays and chassis - they were all decent before.
I disconnected the relays and checked each one many many times to be sure they were relaying and not sticking - they were fine.
I measured voltage at all points - all perfect. I measured resistance across the coils of the heater and all was within .1 Ohms - tested many times (without heater connected).
I hate voodoo, but I replaced the relays anyhow - no change. P2609.
I still hate voodoo, but I changed the heater - no change. P2609.
That's all there is to the system: wires, relays, more wires, then the heater. I just decided to let it go and I was going to have the dealer check it out; maybe a bad computer?
Then wifey said that it took three times to start a couple week later. I could not reproduce.
A couple weeks after that, she said it happened again. Again, I could not reproduce.
Out of abundance of caution, I changed the air filter and then the fuel filter. They were probably at the end of their lives anyhow.
But still, I'd not experienced a problem.
When I started the truck after changing the filter, my wife commented that THAT was the sound!
OK! So...then I was hopeful the fuel filter was the trick.
Then it happened to me. Except I could not get the truck to start at all. Frustrated and ready to tow it, I walked away for a couple hours. I kept thinking...Fuel, Air, Spark. I fixed what I could.
So I decided, on a whim, let me re-seat the injector connectors.
OMG! I pulled the first one, and the connector was oily from fuel.
I cleaned it up with contact cleaner and reconnected and bam! Truck started fast and perfectly.
I did the same to the other two connectors, both of which had some leakage inside, but not near as bad as that front one.
I think this was fuel that wicked up from inside, under the valve cover.
But I don't have a lot of experience, so I am not sure if this is one of those things I need to be aware of, or if it's time to get something replaced, or what?
Oh yeah, that code went way the first time I started the truck after cleaning that connector too.
I put a lot of detail because I've been chasing this one down for a long time, and I spent a fait bit of money replacing good parts. So if someone ever searched P2609, they'll have one more thing to check.
In some of the images I found of the engine, those parts are C115-117.
Is that fuel wicking in a sign of something I need to address (beyond knowing and checking it once in a while)?
Thanks!