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Old 08-29-2016, 11:14 PM   #1
clyde
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XK8 adventure

Some of may have seen on Facebook that the Jaguar finally let me down. I was out Sunday to run some errands, got a few miles from my house and stopped at a red light. When it turned green and I started moving, it felt like it didn't make power, but it got me through the intersection and up to 40mph like a normal person. A couple moments later, I gave it some gas. Revs went up, but it wasn't really moving.

I decided to head home, which meant turning left at the next light. I was the second car in line with a red light. Light turned green and I barely made it into the intersection (what I was afraid was going to happen) before it stalled. It restarted, barely, and immediately stumbled and stalled again. A woman quickly helped me push it out of the intersection. I called AAA, a truck got there in 20 minutes and maybe 50 minutes from the initial stall, the Jaguar was back in my driveway.

A couple weeks ago, I drove it to Altoona and back one evening without incident, turning it off and starting three times along the way (gas, when I got where I was going, pee break on the way back). Parked in the garage when I got home. The next morning, it didn't start, so I took the other car to work. When I got home, it started right up and I moved it from garage to driveway. Yesterday was the first time I started/drove it since.

While waiting for the tow, I tried starting it a few times. It started twice, but couldn't hold idle.

My first thought is fuel pump, which is cool, since I'll need to drop the 1/4 full tank (kinda glad I didn't stop for gas before it stalled) and ieven then, it looks like getting to it, which is above the differential, is a bitch.

Internet research suggests a slight possibility it could be an ECU thing and switching between open and closed loop. If that's the case, unhooking battery for a few minutes might solve it. If it starts again, I should drive up the street and back a few times and log the fuel trims (if I can).
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Old 08-29-2016, 11:36 PM   #2
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Not sure it would've revved up and not gone anywhere if it was fuel related. Sounds like this is going to be a fun one.
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Old 08-30-2016, 08:45 AM   #3
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Based on my experience from a month ago w/ the e46 fuel pump failure, I'd think fuel pump. Sounds similar to my FML experience on the side of the road
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Old 08-30-2016, 09:50 AM   #4
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Not sure it would've revved up and not gone anywhere if it was fuel related. Sounds like this is going to be a fun one.
Yeah, that's confusing. It was kinda like a manual trans car with a clutch slipping, but not really. It was very similar to what I remember happened in my Q45 when the engine went on the 405 near LAX 20 years ago. In that case, I never knew what caused that, but it also dumped all its coolant at the time.

Everything similar to what happened that I've found googling and jaguarforums.com'ing has been fixed by replacing the fuel pump, relay and/or filter or resetting the ECU by disconnecting the battery for a bit (or an ECU reflash when the cars were new-ish).

Assuming it's the pump, part that makes it "fun" is the relative inaccessibility of the fuel pump. It sounds like there's an easy-ish way to do it without dropping the tank (or fully dropping it) with some special tools, but you can't see what you're doing and the impression I get is you shouldn't bother with them if you haven't done the tank dropping way so you know what parts are where and how they move around.

After I diagnose a bit more, if I think it's the pump, I'm actually going to call a couple shops for an estimate and figure it out from there. The part is either around $130 or $250 (mid-year part change and not sure which side the VIN falls on), another $30ish for a new fuel filter. Figure I'm charged 3-4 hours labor at a shop at about $100/hr vs an all weekend adventure that probably includes a big fuel spill in my driveway?
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Old 08-30-2016, 10:58 AM   #5
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are there any good jag forums to search?

nevermind, didn't read your last paragraph
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Old 08-30-2016, 11:45 AM   #6
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Hope it's cheap and/or easy.

I'm still kind of amazed my 1M (N54) fuel pump hasn't died yet. Once it does, I'm sure it will do it in the Holland Tunnel or someplace equally convenient.
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Old 08-30-2016, 12:24 PM   #7
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Hope it's cheap and/or easy.

I'm still kind of amazed my 1M (N54) fuel pump hasn't died yet. Once it does, I'm sure it will do it in the Holland Tunnel or someplace equally convenient.
Why? Do N54s or 1ers have shitty fuel pumps? Or are you confusing the shitty electric water pump that dies between 30 and 70k miles?
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Old 08-30-2016, 12:39 PM   #8
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Why? Do N54s or 1ers have shitty fuel pumps? Or are you confusing the shitty electric water pump that dies between 30 and 70k miles?
The N54 HPFP fiasco went on for years. I think there might have even been a class-action suit.
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Old 08-30-2016, 12:51 PM   #9
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Hope it's cheap and/or easy.
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Old 08-30-2016, 01:30 PM   #10
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The N54 HPFP fiasco went on for years. I think there might have even been a class-action suit.
Right, sorry was thinking the lp pump in the tank. I've had my hpfp replaced on the n54 (twice maybe?)
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