MUSSBERGER

Today I was on a ramp going from Rte 18 (highway) to the GSP. A long sweeping right hander. I downshifted to third and was going about 70 and went to accelerate onto the parkway. All the sudden it starts to hesitate. Catches again and goes away. A little further and it actually bucks a couple of times and goes away. Get off the parkway in case it dies completely and it seems fine. Get back on the parkway to get it home and everything is fine.

It did this a couple of weeks ago under the same circumstances.

Mark Houghton

Fuel pump relay suspect. Of course, could be a host of other things.

bogey1

bad plugs?

jayhawk

this might be a little obvious but how much gas did you have in the tank? My 930 track car stumbles a bit in right handers (on the track) when the fuel level is below 1/4. I try and keep it above 1/2 on the track (also helps with low speed understeer)

b

Porsche Fan

Replace the Ignition Relay under the driver's seat.

Porsche Part Number: 911.618.154.00

Mark Houghton

That's the part number for a DME relay. Aint no DME in a CIS 930...unless you're talking about the engine overspeed relay?

MUSSBERGER

I was messing with it today. Runs ok then the idle comes down and coughed and sputtered but still ran. Pulled the front pump relay and it quit. Put it back in and pulled the rear relay and ran the same. I think its rear pump wiring or the rear f pump is on its way out. I will get into it tomorrow. I ran out of time today

911rudy

I did the same thig but you must swap the relays to make sure that one of them has not failed. Do this with the enginge off of course. It could also be the relay contacts. Make sure that they are clean and if not clean them. Always do the simple easy things first and you will feel like a genius when you solve a big problem with a simple solution. Good luck!