Arnoud

LH rebuilt should only be necessary once, by then having "the brick" updated for a new designed circuit and the capacitors exchanged for new ones (and some possible other components as well). So I am a bit confused why yours was rebuilt several times (unless you updated to PEM's after the 1st rebuilt)?
I had mine LH rebuild earlier this year by John Speake: excellent service! The 928 community is very fortunate to have expert persons like John Speake doing what they are doing.

Fuel pump average life span is in the range of 100-200K miles, so from that point of view you should be fine regarding your in-tank fuel pump. Having written that: I am personally no fan of the in-tank fuel pump, more than enough threads on that subject.
What about your main fuel pump: is it still the original one?

auzivision

Yes, a roadside assistance directory already exists today and is only provided to members of the 928 owners club.

ThetaTau87

This car is new to me. I've owned it for about 2 months. The service history shows that the same owner had the LH rebuild by 928 Int. in 2001, 2003 and 2005. No problems with it since then.

I don't have any records indicating that the external fuel pump has ever been changed. The car has 137k on it now.

ThetaTau87

Thanks. I've been meaning to join and this will end my procrastination.

Bill Ball

I have become comfortable with just driving the car and not worrying about it. I'm more worried about road hazards than the car itself after hitting a drilling rig pipe and other debris on a couple of 1700 mile drives to Texas. The car was not immobilized by either of those, although there was a good amount of damage done.

Although spare 53 relays are not a bad idea, there are already several non-essential ones on the CE panel that you could swap in a pinch for the big 3 essential ones. Still, I do carry a spare 53 and extra fuses. Never had to use them.

A good fire extinguisher is not a bad idea in any car, but I've never carried one except as required by racing rules.

My external fuel pump is original. I suppose I'm tempting fate there at 257K miles. I do change the fuel filter pretty regularly. I did change the internal pump at about 150K miles. They are notorious for developing a break in the hose that joins them to the fuel outlet. That will not immobilize the car. Interestingly, mine was perfectly fine after all those miles, but since I was in there, I replaced it.

The only time in the 14 years I have owned the car that it was immobilized was due to a failed LH. The failure symptoms are usually pretty easy to identify. Fortunately I was close enough to a 928 vendor to get a replacement in less than an hour. The 928OC roadside assistance directory could help with that possible failure, although most S4 owners do not have spare LHs lying around (I happen to though).

My 89 S4 burns no oil between annual 12K mile oil changes (the interval recommended by Porsche's maintenance schedule) unless I beat the living crap out of it (at 150 MPH with runs up to 165, it will burn via the breather system more than a quart in 100 miles). The vast majority of S4s burn essentially no oil under legal driving conditions. So, I never carry extra oil. You've got about 9 quarts in there. Running a quart or so low is not an issue at all. GTSs are another story.

So, the moral of the story is that I carry nothing but the factory tool set (and that spare 53 relay I've never used). I actually had to use the factory jack once when I ran over that pipe so I could get under the car and remove what remained of a severely mangled and dangling exhaust pipe.

Schocki

Fabricate and take a jumper with you for the ignition monitoring relay, since your GT is a 89 MY.

GregBBRD

Replace your fuel lines and/or carry a Halon fire extinguisher.

Other than that:

And anything else that you never want to replace, on the road....

For instance, if you were to carry an extra fuel pump, you would never need it. Hell, throw a cam belt and water pump in the rear....no chance you'd ever use it.

Murphy's Law governs all road trips.

Schocki

Ok here is what I took in our move to Spain in the GTS (2 days and 2000 km). My KTS 300 in a case work the following tools: Multimeter, relay pliers from HAZET and different jumpers.

LT Texan

Just finished a 3,800 mile round trip to Texas. Took fuses, pliers, screwdriver, fuel pump relay jumper and an extra fuel pump relay.

Needed a windshield wiper fuse on the way back.

Last year, I attempted the same trip and didn't make it because my camshaft broke.

Just drive it!

jcorenman

This! ^^^^

Bill Ball

Playing along, if you had carried a spare camshaft with you, it wouldn't have broke.

Tails

Check all fluids and tire pressure and go.

Or if you are really concerned hook up a trailer and fill it with spares etc.

Tails 1990 928S4 Auto

dr bob

I regularly read about carrying "extra" 53 relays. My one personal relay issue happened at the end of the driveway, so I've never been stranded on the road by a relay fail. Doesn't mean it won't happen. So my advice on relays is to buy spares for at least the four critical 53b relays (LH, EZK, Fuel Pump, X bus) and install them in the car now, in the driveway, before you go anywhere. Carry a spare if you wish, but there's a horn relay if you need to experiment on the road while you wait for a flatbed.

I carry the mini relay jumper mostly because the car is the safest/easiest place to store it. I made a set of 8-foot 10ga mini "jumper cables" with battery charger clips, after sitting with a 'fun ride' participant waiting for the AAA truck to come give him a boost. He'd been sitting a while with parking lights on, and the battery was old. I keep a mini pocket toolkit in a folding case, with small sockets, screwdriver tips, and a 4" long ratchet. There's a Harbor Freight free giveaway multimeter, a Buss fuse pack. There's a couple spare 100W H1 bulbs for fogs and aux main beams, again because it's the safest place to store them; I've never bothered to change one on the road since they are seconday lighting at most. I do carry a couple spare tail/running light bulbs, safest place to store them. The rest of the little 10" cloth toolbag is stuffed with window cleaner, some terry and microfiber towels, a large plastic trash bag and a couple pairs of plastic gloves.

In the driver's door pocket there's a large MagLight wrapped in another terry towel, plus a couple of those cheap H-F LED flashlights in the glove box.

The factory tool kit is intact and unused so far. The factory compressor(s) live safely in storage, with an aftermarket replacement living in the spare. Full set of spare engine accessory belts is in there too, along with replacements for the factory plastic spare-wheel bag and the gloves.

On the trip to OCIC in Dallas a few summers ago, I added a quart of oil and a gallon of distilled water to the boot just in case. They went back on the shelf when I got home. Reality is that the gallon of water might have been handy if I got thirsty, but it's not enough to fill the cooling system if there's a leak serious enough to notice on the temp gauge. Similar on the oil, where it might have been handy if the car used oil. It doesn't, and rumor has it that there are stores along the way that sell oil if I need some.

Maintenance is done well enough on the car that I don't look at anything more than tire age and condition before taking a serious cross-country ride. If the car doesn't give you that level of confidence, you should just take the Yugo.