[dgt]

I have a 1988 944T race car that this is occurring on, but know this problem has been noted on 944 NA's also, thus requesting this boards help.

When I am racing with a full tank of gas, no problem. But as soon as I have used 6-7 gallons, the car cuts out for 1-2 seconds when coming out of hard right corners and hard right corners only, then picks back up and runs fine again until the next hard right turn. Fill up the car, runs great again until 6-7 gallons are used, then it cuts out in the same corners again. This does not happen sometimes, but all of the time that this scenario is met.

In an October 31st 3 hour enduro race, this cut-out occurred every 35-40 minutes, requiring a pit stop to top off the fuel tank with 6-7 gallons at that time, then it would run fine again for another 35-40 minutes.

The car has had this problem since I first tracked the car in a late September PCA regional race, and has happened at each track event since as soon as the fuel level is 6-7 gallons below full. Keep the car full, and it runs great - but not an option to run competitively carrying 80 extra lbs of fuel, and not an option at all in enduro races (required 4 pit stops to finish the race).

I've visually checked the inside of the tank/tank filter, replaced the fuel filter and fuel pump (twice), replaced all vacuum lines, spark plugs, spark plug wires, rebuilt fuel injectors/seals. Nothing has changed so far.

I have also researched this problem on the PCA tech site as well as the Pelican forums, and have seem this problem noted a couple of times over the years, but the 'fixes' mentioned have mostly not been real fixes (ie replace the fuel tank, or run with a full tank and you'll be fine). There were some posts mentioning electrical issues, but the consistency of this only happening after I use 6-7 gallons of fuel seems to lead towards a fuel starvation issue - but how with 14 gallons of fuel left? Obviously, many 944/951's start a race with much less fuel than this so they end near empty.

Anyone with similar issues or ideas on what to check next?

Thanks, Doug