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Registered
Join Date: Jul 2004
Location: Burlington, ON
Posts: 605
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Hot start problem - '87 930
Posted in the 930 forum as well....but it's slow over there!
The car: - 1987 930, 114,000 miles - (top end redone approx. 40,000 miles ago) - SC cams - Andial fuel enrichment - Stock intercooler - Garret T-04 60-1 hybrid turbo - B&B exhaust - Adjustable boost controller - set at 0.9 bar - Stock CDI ignition I recently replaced the cam seals and some other gaskets while I was in there. Re-timed the cams, etc. Car was running without issue prior to this repair. Since the repair I have had the classic hot start problem....shutdown for 5 minutes and no problem.....shutdown for more than 20 minutes or so and it won't start until it cools down. Engine will crank, but won't fire. I have replaced the accumulator and front fuel pump check valve this week (both original as far as I can tell) and the problem persists. Injectors were removed and cleaned proefessionally last year. Fuel filter has less than 5,000 km on it. Both fuel pumps may be original. Thermotime switch is disconnected. I checked the pressures this morning, and were as follows: Temp: 85 F System: 6.7 bar Cold Control: 2.8 bar (this seems a bit high?) Warm Control: 3.9 Rest: 2.5 bar - decreases to 1.8 at 10 minutes, 1.7 at 20 minutes No starting issues previously. Runs fine otherwise. Problem is definitely related to heat soak. Any ideas? What to check next?
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- '00 Dodge Viper GTS - Steel Grey - Yep...a domestic. - '87 930 - Guards Red - Sold - '82 911SC - Grand Prix White - Gone - '78 928 - Silver - Long gone - '04 Subaru WRX wagon - Sold Last edited by Kirk911SC; 07-11-2011 at 07:18 AM.. |
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07-10-2011, 04:00 AM
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Registered
Join Date: Jul 2004
Location: Burlington, ON
Posts: 605
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Anyone?
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- '00 Dodge Viper GTS - Steel Grey - Yep...a domestic. - '87 930 - Guards Red - Sold - '82 911SC - Grand Prix White - Gone - '78 928 - Silver - Long gone - '04 Subaru WRX wagon - Sold |
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07-10-2011, 04:12 PM
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Registered
Join Date: Jul 2004
Location: Burlington, ON
Posts: 605
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Monday morning bump.
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- '00 Dodge Viper GTS - Steel Grey - Yep...a domestic. - '87 930 - Guards Red - Sold - '82 911SC - Grand Prix White - Gone - '78 928 - Silver - Long gone - '04 Subaru WRX wagon - Sold |
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07-11-2011, 07:06 AM
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Registered
Join Date: Jul 2004
Location: Burlington, ON
Posts: 605
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I guess I should have been more specific.....the car will crank when hot, but won't start (edited original post).
Definitely not starter related.
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- '00 Dodge Viper GTS - Steel Grey - Yep...a domestic. - '87 930 - Guards Red - Sold - '82 911SC - Grand Prix White - Gone - '78 928 - Silver - Long gone - '04 Subaru WRX wagon - Sold |
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07-11-2011, 07:17 AM
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RETIRED
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OK....does it cough when starter fluid is used? Does it have spark?
Will it start when cold? Could be heat fail related on the solder joints in the DME.
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1983/3.6, backdate to long hood 2012 ML350 3.0 Turbo Diesel |
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07-11-2011, 07:24 AM
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Registered
Join Date: Jul 2004
Location: Burlington, ON
Posts: 605
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No DME in a 930.
Starts fine when cold. Runs well cold or hot. I was thinking of trying starter fluid, but I could pull a spark plug and crank as well to test. The pressures seem to check out. I'm thinking it could be heat soaked ignition parts, relays, etc. Very frustrating problem.....
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- '00 Dodge Viper GTS - Steel Grey - Yep...a domestic. - '87 930 - Guards Red - Sold - '82 911SC - Grand Prix White - Gone - '78 928 - Silver - Long gone - '04 Subaru WRX wagon - Sold |
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07-11-2011, 07:57 AM
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RETIRED
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If you can conifrm lack of spark when warm, likely the DME, swap in a know good one or send it to Ingo for testing.
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1983/3.6, backdate to long hood 2012 ML350 3.0 Turbo Diesel |
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07-11-2011, 08:01 AM
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Da cab
