MickeyD
TYF Newbie
- Joined
- Nov 2, 2019
- Posts
- 24
- Reaction score
- 8
Good morning all!
I’ve been having an intermittent issue with my 09 Tahoe, and I’m looking for a bit of guidance. For reference, it is a Flex Fuel truck, but I only ever use gasoline. The truck is sitting at about 200,000 miles on the factory drivetrain.
A while back, I would periodically have issues starting. It would turn over and start, but there were mechanical sounds from the bendix sometimes, so I replaced the starter. No biggie. But even after that, sometimes it would turn over but have trouble catching, almost like it needed choke. I had been long overdue for plugs and wires, so I replaced them with OEM. And, it has had a new engine air filter.
That was around 1,000-2,000 miles ago. Recently, though, it has occasionally been hard to start again. I have found it is typically when the engine is at operating temperature; cold starts are fine, but if I run into a store and back out 10 minutes later, it will sometimes have this issue. It turns over and sputters, and while keeping the starter engaged it will catch and start a few seconds later. Now, every once in a while it is giving the P0175 code, where it sometimes goes away on its own, then comes back later that day or the next day. Additionally, every once in a while I will catch a whiff of gas when I get out after shutting it down.
I did replace the fuel pump/sender/lines with OEM maybe 10,000 miles ago.
So, I am wondering if anyone has a good place to start. I know the P0172 and P0175 codes can be tricky, but from my reading I haven’t found a clear answer where this comes up only at operating temperature. Does it make sense that it’s as simple as the O2 sensors, or could it be related to the MAF. Or, might it be a fuel pressure issue?
I hate to just throw parts at it if there’s a known, simple problem/solution that someone could identify. Thanks in advance for any guidance you can provide!
I’ve been having an intermittent issue with my 09 Tahoe, and I’m looking for a bit of guidance. For reference, it is a Flex Fuel truck, but I only ever use gasoline. The truck is sitting at about 200,000 miles on the factory drivetrain.
A while back, I would periodically have issues starting. It would turn over and start, but there were mechanical sounds from the bendix sometimes, so I replaced the starter. No biggie. But even after that, sometimes it would turn over but have trouble catching, almost like it needed choke. I had been long overdue for plugs and wires, so I replaced them with OEM. And, it has had a new engine air filter.
That was around 1,000-2,000 miles ago. Recently, though, it has occasionally been hard to start again. I have found it is typically when the engine is at operating temperature; cold starts are fine, but if I run into a store and back out 10 minutes later, it will sometimes have this issue. It turns over and sputters, and while keeping the starter engaged it will catch and start a few seconds later. Now, every once in a while it is giving the P0175 code, where it sometimes goes away on its own, then comes back later that day or the next day. Additionally, every once in a while I will catch a whiff of gas when I get out after shutting it down.
I did replace the fuel pump/sender/lines with OEM maybe 10,000 miles ago.
So, I am wondering if anyone has a good place to start. I know the P0172 and P0175 codes can be tricky, but from my reading I haven’t found a clear answer where this comes up only at operating temperature. Does it make sense that it’s as simple as the O2 sensors, or could it be related to the MAF. Or, might it be a fuel pressure issue?
I hate to just throw parts at it if there’s a known, simple problem/solution that someone could identify. Thanks in advance for any guidance you can provide!
