Wierd Hot Start Problem
 

Hey Pelicans, My 911SC is acting up on me, I drove the 911 the whole day, running errands. I take her out to the grocery store in the evening, and when I get to my house, I shut the ignition off. A minute later, I realized that I need to move my car(don't want to risk any door dings from my neighbors vehicle). So I go to start her up again and she won't start. The motor makes the noise like she wants to turn over, I hear the motor crank but not fire up. It is strange because this problem only happend a few times, and only after being driven hard. I have never had this happen after my 911 had been sitting. From a cold start, my SC fires up real strong, the motor idles at 1300-1200rpm then levels out at 950-1000 rpm. So I left the 911 alone for 3 hours and went outside later, turned the ignition and it started strong as ever. :confused:Has anyone had similar start problems that come and go? I have heard about hot start problems being related to problems with the fuel pump and fuel alternator, but both of these parts are fairly new in my car. On a more positive note, I completed my first 911 projects yesterday, changing the brake pads and rotors, wheel bearings, and performing an oil change. I had a friend who is knowledgeable with p-cars help me with these tasks, thanks Dane.

Here are some details as to what my car has:
The motor was rebuilt 6,000 miles ago by P.O.'s friend:
- all heads rebuilt with all new parts
- cams reground by webcam
- all new bearings and seals
- polished the crank
- new time chains and guides
- entire rebuild kit from Vertex
- low mile p/c set from an 82 SC (the old ones were good, but the PO stumbled onto these with 60K on them. a 82 is also higher compression ratio)
- new ignition wires (steel braided)
- new turbo valve covers
- new fuel pump
- new fuel accumulator
- new turbo tie rods
- pop off valve
- carrera chain tensioners
- new rebuild on the alternator
- nice bilstiens (4)
- new sachs clutch pack
- re-ground flywheel
- all new seals and gaskets in the 915 ( PO inspected the 915, all good)
- all new CV joints & boots
I had a mechanic adjust the CO to the proper level and set the idle level to correct specs last week. I replaced the spark plugs 3 weeks ago.

Fuggetaboutit.....I figured the problem out today, apparently some PO had hacked into the fuel pump wire running from underneath the fuel relay. Whoever did this, chose the cheap route and used a buttonclamp to reconnect the wires instead of replacing them. So the connection was getting loose, causing my 911 to have start problems. I took the car to C&J motors and they are soldering a new wire in. Looks like problem solved.

Pari,

Great news! I'm glad you found the problem so quickly. My "starting issues" took several frustrating months to finally resolve. Happy driving!