9 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHOccasional hard start - fires then dies
Leading reported evidence
Check voltage
Suggestion or failed attempt
No successful repair reported for this finding.
0
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0
Unsuccessful attempts
1
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Suggestion
- check voltage from behind the alternator with a insulated bent piece of wire to get to the terminal
Leading evidence: 'Check voltage' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check voltage' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion
- venting valve (only if the car won't start after filling gas)
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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9 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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Generation: 20261026T205155Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hey folks. My 99 c2 cab tip has been hard to start on 2 separate occasions. I turn the key and it fires for about a second then dies. and will just crank. a minute or so later it will start and then run fine. No issues. I am thinking a fuel pump relay based on some old posts. I figure its easy enough to try so i will go get one this evening and put it in.
What are your thoughts? Thanks. I appreciate it.
There are quite a few threads on this. Search under slow start. This seems to affect all 996s.
Outputs:
- Cable connecting battery to rear engine compartment loses 1-1.5v in transmission due to it being a crappy cable. Replacement is $75 + ~2hrs labor
- Starter motor second possibility, replacement ~$300 + labor
gl
For this achievement, you receive one internet.
*many 996s are affected.
https://rennlist.com/forums/996-foru...ard-start.html
https://rennlist.com/forums/996-foru...ng-issues.html
https://rennlist.com/forums/996-foru...arm-start.html
https://rennlist.com/forums/996-foru...er-1-hour.html
https://rennlist.com/forums/996-foru...n-t-start.html
https://rennlist.com/forums/996-foru...ht-needed.html
one of the parts:
http://www.pelicanparts.com/cgi-bin/...07-019-01-M100
some detail from dan_189:
Ashai did a great write up on how to test.
The basics are:
- get the car hot
- turn on headlights, Ac, radio to simulate load
- check voltage from behind the alternator with a insulated bent piece of wire to get to the terminal
- check the voltage at the jump start post
If they differ the cable is cooked and needs to be replaced.
There however are other things that can cause this problem:
- crank angle sensor
- starter
- venting valve (only if the car won't start after filling gas)
Just to clarify, your engine spins over fast so we can eliminate starter, cables, battery ect. There are no fault codes or any indications that the fuel mixture is lean/rich, can eliminate low/high pressure or fuel control issues.
Sounds like the fuel system is loosing it's prime. After the fuel system has built up pressure and turned off, it should hold that pressure for at least 30min, I think there is a specs of something like 1psi per min, but if there is a starting problem the drop is usually very fast like 15psi per min. On the returnless system the check valves are in the fuel pump and the fuel regulator in the tank. On the return systems the check valves are at each end, one in the fuel pump and one in the fuel regulator on the fuel rail. The most common cause of pressure drop after shutdown is the check valve in the fuel pump( of course a leaking injector will cause this also, but very rare). Hook up a fuel pressure gauge and build up the pressure then turn off and observe the drop. If the pressure drops too fast it can cause fuel to boil on a hot engine and restart will be extremely difficult, not so bad cold.
Also the firing up then dying is an indication of the fuel system loosing its prime ( the fuel in the rail can bubble hot due to pressure lose and vapor lock). The fuel in the rail is enough to fire it up, but then the bubbles enter and it dies.
