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Engine will not start after it is hot
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carlos402000
Novice
Jun 19, 2016, 3:08 PM
Post #1 of 9
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Engine will not start after it is hot
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Volvo 2001 S80 2.9 non-turbo 95,000 miles.....scanner shows no faults, I have replaced MAF, crank sensor, cam sensor, cleaned Throttle Body, injectors. Good 55-60 psi on fuel gauge, good spark. After sitting in the garage for 3-5 days starts first try and runs great until it gets hot and you shut it off and try to start it right away. It will not start again for another few days. I press the accelerator a couple times but does not make any difference. I don't know if it gets flooded but sometimes when I press the accelerator to help it start I smell gasoline. Going crazy as I don't know what else to try. I start it every few days to keep battery charged up. Anybody with Volvo knowledge, please assist. Thank you!
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kev2
Veteran
Jun 19, 2016, 3:31 PM
Post #2 of 9
(1456 views)
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Re: Engine will not start after it is hot
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scanner will read ALL codes - low end code readers will NOT read all esp so called manufactures specific P1000 and up.
Check fuel pressure then with KOEO observe pressure leak down.
When A no start - is there spark at several plugs?
PS pumping the accelerator is useless TRY holding it full down... called clear flood.
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Hammer Time
Ultimate Carjunky
/ Moderator
Jun 19, 2016, 3:38 PM
Post #3 of 9
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Re: Engine will not start after it is hot
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When you checked the fuel pressure did it hold rest pressure when shut off?
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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carlos402000
Novice
Jun 19, 2016, 4:00 PM
Post #4 of 9
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Re: Engine will not start after it is hot
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Understand that I should check fuel pressure after shutting it off to see if it holds it? I have also tried holding pedal fully to the floor but no difference either. I have not checked for all plugs sparking after shutting off engine and trying to restart. I just started it today so now I have two wait a couple days to restart it again. I should try it then I guess to check for all spark plugs sparking and fuel pressure leak if any?
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carlos402000
Novice
Jun 19, 2016, 4:05 PM
Post #5 of 9
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Re: Engine will not start after it is hot
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I have not checked for fuel pressure leak afterwards. I checked it during engine off for a few days and read right at 55 psi when turning ignition switch on and pump activated. While engine was running was up at approx. 60 psi.
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kev2
Veteran
Jun 19, 2016, 4:25 PM
Post #6 of 9
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Re: Engine will not start after it is hot
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I am not sure you understand - we are asking for a pressure leak down test with KOEO.
start engine check fuel pressure, then turn engine OFF and the quickly turn ign ON - KOEO key on eng off - this will energize the system as we look for a pressure drop..ie dropped Xpsi in 5minutes. THen key OFF again observe pressure drop.
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carlos402000
Novice
Jun 19, 2016, 4:54 PM
Post #7 of 9
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Re: Engine will not start after it is hot
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I clearly understand now that you broke it down for me. I will do that and let you now what the results are. I thank you kindly.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jun 20, 2016, 10:58 AM
Post #8 of 9
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Re: Engine will not start after it is hot
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Sorry if I missed what you meant when any testing. Do so WHEN it has failed and wont start not when it seems to run fine it could test fine?
Spark? Dunno if a hard one to put an in-line tester on this or not. I have a few and for intermittent no starts like this ones I have you can leave on and drive the car then with a helper if dead but cranking see no spark. I'd rather not leave stuff on but have had then so erratic and didn't stay dead long needed it where ever the @#$%ing car left me!
Had to know. Fix on a clunker was more in parts than I was willing so that now junked - sorry now I didn't fix it. Ugly sucker but a great beater car for lousy weather all legal and fine otherwise but not putting up with surprises like that for anything, clunker or not.
Might have been a K-D inline tester for many type of high voltage wires to a plug or coil to a wire type thing,
T
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carlos402000
Novice
Jul 3, 2016, 6:09 PM
Post #9 of 9
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Re: Engine will not start after it is hot
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After a few days the car started right up. when I turned ignition "On" fuel pressure went up to 55 PSI and started fine. When engine started pressure went up and stayed steady at 60 PSI. Ran good and then I turned engine "Off" and quickly the ignition "on" and gauge read 10 PSI and dropped down to "0" within 5 minutes approximately. Turned ignition back "On" and it went up to only 10 PSI and not higher than that. No wonder it does not start! Be aware that I also replaced the fuel pressure regulator also back then. One thing that I noticed when I was screwing in the fuel pressure gauge on to the fuel injectors rack valve.....the valve started rotating with the fuel gauge nozzle at the same time. I believe the valve is not supposed to rotate base and all.......I know pressure must be lost through it as it is not seal properly. I thank you in advance for your assistance!
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