HPFP grumblies, fuel level, thermostat, and is this cigar really just a cigar
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HPFP grumblies, fuel level, thermostat, and is this cigar really just a cigar
I have signs of the well-known HPFP issue. But I'm not dead in the water, I'm functional so long as I finesse the car. The current HPFP is one yanked off of a wrecker and bought on eBay, untested, and I have a sense of its characteristics. In fact, most of the time it supplies appropriate fuel rail pressure (which I know from watching it with a scanner).
The original HPFP was presumed in need of replacement because of all the usual stuff -- CC-ID 029 + P15DF + P0087 + MIL, and I swapped it out for the aforementioned one as soon as I bought the car. So I don't really know the original's hands-on behavioral characteristics.
Here's what I seem to note with the replacement HPFP. Clearly something is up -- I get chugging under certain kinds of sudden or hard load, and first start of the day does the well-documented annoying stuff. But again, if I finesse the car -- specifically the acceleration -- I don't wind up with the half-check-engine-light (the CC-ID 029). In fact, sometimes I can even get it to go away.
One thing I've noted, and this is one of my "the heck?" questions, is that the thing seems to get more sensitive and twitchy the lower the fuel level gets. Full tank? Sometimes it twitches but I can play Mini Whisperer to get it to mostly behave. By 1/2 tank I'm thinking I'm losing my touch. By low-fuel complaint it's definitely giving me a harder time in general and doing so more often.
All of this made me wonder if my HPFP is the "entire issue." In fact, I just replaced my low pressure pump and fuel filter because I noted I wasn't landing the 5 bar/72.5psi supply-side minimum with consistency at startup -- sometimes it was down in the 50-something-psi range. So with 143K miles at purchase, fuel filter changed never, I figured I may as well be thorough. That seems to have fixed the supply-side minimum pressure. But I still have garden variety HPFP chug-a-lug, so the supply-side issue wasn't all that was going on.
New HPFP is inbound but I guess what I'm asking is this: even with the HPFP itself being funky, what *other* things are contributing factors that people seem to observe? Fuel level? Other? And what's with the thermostat occasionally (and I mean *really* occasionally, but often enough for me to have noticed it) throwing a code exactly when the HPFP gets funky? Is that part and parcel of this too?
Sorry for the minor ramble, just trying to sponge up a lot of info at once.
Oh yeah, 2011 Mini Cooper S Hardtop, 11/2010 production.
The original HPFP was presumed in need of replacement because of all the usual stuff -- CC-ID 029 + P15DF + P0087 + MIL, and I swapped it out for the aforementioned one as soon as I bought the car. So I don't really know the original's hands-on behavioral characteristics.
Here's what I seem to note with the replacement HPFP. Clearly something is up -- I get chugging under certain kinds of sudden or hard load, and first start of the day does the well-documented annoying stuff. But again, if I finesse the car -- specifically the acceleration -- I don't wind up with the half-check-engine-light (the CC-ID 029). In fact, sometimes I can even get it to go away.
One thing I've noted, and this is one of my "the heck?" questions, is that the thing seems to get more sensitive and twitchy the lower the fuel level gets. Full tank? Sometimes it twitches but I can play Mini Whisperer to get it to mostly behave. By 1/2 tank I'm thinking I'm losing my touch. By low-fuel complaint it's definitely giving me a harder time in general and doing so more often.
All of this made me wonder if my HPFP is the "entire issue." In fact, I just replaced my low pressure pump and fuel filter because I noted I wasn't landing the 5 bar/72.5psi supply-side minimum with consistency at startup -- sometimes it was down in the 50-something-psi range. So with 143K miles at purchase, fuel filter changed never, I figured I may as well be thorough. That seems to have fixed the supply-side minimum pressure. But I still have garden variety HPFP chug-a-lug, so the supply-side issue wasn't all that was going on.
New HPFP is inbound but I guess what I'm asking is this: even with the HPFP itself being funky, what *other* things are contributing factors that people seem to observe? Fuel level? Other? And what's with the thermostat occasionally (and I mean *really* occasionally, but often enough for me to have noticed it) throwing a code exactly when the HPFP gets funky? Is that part and parcel of this too?
Sorry for the minor ramble, just trying to sponge up a lot of info at once.
Oh yeah, 2011 Mini Cooper S Hardtop, 11/2010 production.