blazersman

So I decided to take the car to the local 1/8 mile track last night for the first time. 2 cars broke down.... both rx7's (figures). I'm currently troubleshooting my issue, trying to find any ideas that might help me out when I go back today and work through it.... or just haul it to a local shop.

The car broke down during my second run. The track wasn't hooking up real well, and I was on 18" street tires. Therefore, both runs I took it semi-easy out of the shoot (but still had some wheel hop) and shifted quick and easy into second to be safe. I figured it was fairly safe to go pretty hard shifting into third during my second run.... wrong.... car went sideways and evidentally my fiance's heart skipped a few beats in the stands, haha!

Anyways, it was weird.... after the car went sideways, I corrected the car and then let out of the gas to just cruise down the rest of the way. So the car was in third now and slowing down, then I give it some gas and it feels like it normally does if you're in a too high gear.... so I naturally shift it in to second.... the car's rpm's gets higher, as usual when shifting into a lower gear.... but when I get on the gas, the car has no go. The car slows down and shuts off when I come to a stop. Honestly, it felt like it does when you run out of gas. there wasn't any real loud noises and the car was generating rpm's fine, so I don't think it is engine related. And since the car won't start, but rolls fine and looks good underneath, I don't think it's axel/rear end related.

When we head back today, we are going to troubleshoot the fuel system first. Since I am new to the car, I'm not too familiar with how it is wired up and everything... but we'll see. I've seen some cars jar the safety sensor that cuts fuel in rear-end collisions at the track.... not sure if my car has that or not, but we're going to check. It's a pfsupercars build, T78 with TEC3.

Any other suggestions?

NTIMD8

iTrader: (1)

I would start by checking to see if any vacuum lines popped off.

ATLGT

iTrader: (1)

When you gave it gas, did the rpms rise or did nothing at all happen? Also check for spark. May have just blown a coil.

blazersman

When I tried to get back on the gas, nothing happened at all. The car simply slowed down and stalled out. I was able to downshift and the rpms did rise when i did that, but did not rise when i tried to accelerate.

Thanks for the suggestion!

JTurtonRX_7

what did that v8 rx7 that was there pop as well?

check the map sensor

mono4lamar

iTrader: (32)

Check for spark and fuel pressure.

blazersman

he demolished his rear end.... locked up on him at the end of the track!

bad night for fd's

blazersman

FIXED!!!! Looks like when the car jerked around after breaking loose it jerked some connections loose that power the fuel pump. Wiring in the car is pretty lousy.... that may need some working on. Easy fix in the daylight.... wish I would have seen it last night, haha!

JTurtonRX_7

good job man, leme know when you go to the track again. hopefully ill have the suspension all in the car in a few weeks. full delrin bushings and tein ht's. Ill probably do worse at the track with that road race setup but oh well.

blazersman

sounds good.... I'll let you know for sure when I head back up there. maybe we can hit some back roads, there are some nice ones in floyd and radford, haha! if you're not doing anything next saturday, you should hit up our show that we are putting together.

blackcloud

idled like crapp only seems like power on one rotor, ignition is good havent checked vac lines. can u describe how u fixed/check fuel pump wiring?

TpCpLaYa

iTrader: (10)

pop ur gas cap open, unscrew it, have someone (or urself if your quick) turn the key to on but dont start.

You should easily hear the fuel pump come on for a second or two, if you dont check the wiring, fuses, ect

blazersman

yep... exactly... mine sounds like a freaking airplane without the gas cap open, so it was pretty easy for me to realize what wasn't working to begin with, just didn't have the light or time to fix it that night.