So I've got a love/hate relationship with my C70 hardtop. Most fun car I've owned, love driving it, but it's been one issue after another. It's to the point where my boss jokes around saying "So what's the car problem this month?"
Anyway. Here's the brief backstory and what I've done to diagnose and repair so far.
Car has about 138k miles on it, so things are bound to need fixing and/or replacing. Since March it's had a new head gasket, new timing belt (with pulley and tensioner), new serpentine belts, two new camshaft position sensors, new radiator (highway construction took a bite out of it), and new spark plugs. There's other things that aren't relevant to this, but that's where I'm at with replacing stuff.
I was driving home with my daughter, sitting at a stop light. I turned onto the main road and got maybe 5 feet before the car sputtered twice and shut down. Like complete shutdown. Hit the hazards, turned the key off, tried to start but got this weird noise and it didn't sound like it wanted to fire, at all. Pushed the car off the highway and into a parking stall, got it towed home.
I'm not a professional mechanic but I've worked on every car I've owned over the past 25+ years so I know a fair bit.
Since getting it towed home, I changed the belts (one of them snapped and was gone, the other was starting to fray), cam sensors, and spark plugs. Wiring looks ok. Starter motor is working because it's spinning the engine. I can see the belts moving when cranking, so I know it's not locked. Electrical systems work, I can put the top up and down no problem, it just will not start. It makes a sound like the engine is just being spun by the starter but absolutely no indication that it's even trying to fire. Had a code before about the cam sensors, so I replaced those.
I'm down to possibly fuel delivery issues. Got a code for low fuel rail pressure, so not sure if it's the pressure sensor or what. I hate just randomly swapping parts. I especially don't want to change the fuel pump unless I have to, because as far as I can tell I have to drop the tank (there's no access panel in the passenger area or trunk, from what I can tell.) It's probably *LONG* overdue for a fuel filter replacement.
I suppose my primary questions would be:
- Is there a fuel pump relay I can test? Getting mixed answers, some saying it's in the glovebox panel, some saying it's on a board...
- How likely is the fuel pump itself to just bite the dust. Southern US car, only been around Florida so it's hot as hell year round
- How likely is the fuel pressure sensor to go? I've seen people saying both "rarely" and "it's an actual issue"
- Would a fuel filter with 138k on it be enough to cause a no-start condition due to low fuel pressure?