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stockvn
P Plater
12 Posts
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 Posted - 10 Aug 2007 : 7:27:24 PM
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i am new to this type of car a friend has lent me this car to fix up a hand full of problems the last problems has got me stuffed as i own an RB30 and this v6 is all different to me.. my problem is when the car is cold first thing in the morning it starts first go after i drive it to work and its 1/4 temp after its left for 2 hrs it cranks for 8 seconds then starts when it starts it runs smooth and dont blow smoke and can be driven all day and re started time after time in a 5 min gap but again when left for 1-3 hrs it wont ever start in the normal 1-2 seconds.i have tried a different ecu and makes no difference.also has new repco plug leads.thanks
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FXST01
P Plater
37 Posts
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Posted - 12 Aug 2007 : 4:57:49 PM
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| Sounds very much like the Crank Angle Sensor (CAS), next time you try and start it hot and it doesn't start, pour some water on the CAS, (down near the harmonic balancer, on right hand side as you look at the motor with wires coming from it)and then try and start it. |
Illegitimi Non Carborundum |
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stockvn
P Plater
12 Posts
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Posted - 12 Aug 2007 : 6:31:37 PM
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| today i cleaned the throttle body was black and oily then reset the ECU still did it.i will try that tommorrow with the water...i also checked the temp sensor at the back of the engine and was in specs hot and cold,,, |
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trizo
Forum Moderator
3091 Posts
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Posted - 12 Aug 2007 : 7:33:25 PM
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lol your core plug didnt fall out as well??
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3 can keep a secret if 2 are dead |
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stockvn
P Plater
12 Posts
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Posted - 12 Aug 2007 : 8:18:52 PM
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lol your core plug didnt fall out as well??
i am lost whats a core plug?? |
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trizo
Forum Moderator
3091 Posts
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Posted - 12 Aug 2007 : 8:46:30 PM
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| dont get me started lol!! Its the plug that sits onderneath your extractors, there are two of them!! lmao |
3 can keep a secret if 2 are dead |
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nodg
National Driver
1667 Posts
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Posted - 13 Aug 2007 : 06:25:49 AM
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| fuel pump presure(filter, pump, presure regulater, blockages), leaking injecter or cracked and worn o-ring seals |
Cheers,
Nodg. |
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stockvn
P Plater
12 Posts
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Posted - 13 Aug 2007 : 7:33:45 PM
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| well cooling the (CAS)with water did nothing and today i left the fuel cap off and made no difference but it has spark when you crank it i am thinking its a vapor lock of some sort becouse if l leave the car over night it starts first go and short trips is fine. |
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trizo
Forum Moderator
3091 Posts
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Posted - 13 Aug 2007 : 7:52:38 PM
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| sounds like it over heating! |
3 can keep a secret if 2 are dead |
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stockvn
P Plater
12 Posts
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Posted - 13 Aug 2007 : 8:04:11 PM
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| the engine coolant is not over heating it only gets to 1/4 i even used it to tow a trailer with a cage full of fire wood and even then it ran cooler than my rb30 this vn has the trany auto cooler in front of the radiator the car is used to tow a caravan time to time. |
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stockvn
P Plater
12 Posts
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Posted - 14 Aug 2007 : 11:33:05 PM
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| well today i checked trubble codes came up as 12 all good there is spark when cranking i spoke to the origianl owner they had 3 mechanics try to fix it with no luck and has been with this problem for the last 7 years. i suspect its a vapor lock in the fuel rack??? dont know if anyone has had a fuel vapor lock problem and fixed it |
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stockvn
P Plater
12 Posts
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Posted - 15 Aug 2007 : 6:47:35 PM
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| found the vacuum pipe was leaking from pressure regulator to inlet replaced it now it takes 3.5 seconds to start there is no leak on the regulator checked with mity vac should still start faster,,,, my rb30 takes 1 sec hot or cold ,any ideas??? |
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VNSVLE
Forum Moderator
1316 Posts
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Posted - 15 Aug 2007 : 7:30:42 PM
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| Try reseting the ECM. The cars ECM may have compensated for the vacuum leak and now you have fixed it it may not have righted itself. |
What's the difference between understeer and oversteer?
Understeer is when the driver is scared.
Oversteer is when the passenger is scared. |
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stockvn
P Plater
12 Posts
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Posted - 16 Aug 2007 : 7:09:39 PM
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| reset ECU and even checked injector pulse with a noid tester that plugs into loom and has a pulse soon as the starter fires up but still takes like 4 seconds to start when left sit for an hr from being used. ..i think its time to let go.. |
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VNSVLE
Forum Moderator
1316 Posts
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Posted - 16 Aug 2007 : 7:29:33 PM
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Is it giving you any other problems other than takes a little bit longer to start??
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What's the difference between understeer and oversteer?
Understeer is when the driver is scared.
Oversteer is when the passenger is scared. |
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trizo
Forum Moderator
3091 Posts
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Posted - 16 Aug 2007 : 8:02:12 PM
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| fuel pump might be on its way now? Or maybe your fuel filter? These might be a few reasons for it takin a bit longer to start! |
3 can keep a secret if 2 are dead |
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stockvn
P Plater
12 Posts
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Posted - 16 Aug 2007 : 8:55:06 PM
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| other than taking 4 seconds to start it performs very well and gets driven to work every day , i looked at it today and i think this is normal dont know after an hr there is pressure still pressure in the rail how much should there be? and anyone know what the fuel pressure should be when running RPM and where do you put the tester ??thanks |
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trizo
Forum Moderator
3091 Posts
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Posted - 17 Aug 2007 : 02:24:54 AM
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| does the fuel pump cut out after 4-5 secs??? if it dont it could be slightly flooding ! |
3 can keep a secret if 2 are dead |
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stockvn
P Plater
12 Posts
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Posted - 17 Aug 2007 : 08:09:08 AM
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| most of the time it cuts out 1 time out of 7 it still gos after i lock the car up (10sec)what would do this make the pump run with the key out. ECU ?or ignition switch/relay sticking? ....tomorrow i was thinking of pulling the pump fuse same at time the engine turns off then starting it up in an hrs time .. |
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VNSVLE
Forum Moderator
1316 Posts
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Posted - 17 Aug 2007 : 4:03:42 PM
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| Does your fuel pump kick in for a few seconds when you first turn the key on before starting the car?? Before the car is started and the engine builds up pressure the fuel pump is controlled by the ECU. Once the engine has oil pressure up an oil pressure switch controls the operation of the fuel pump. Maybe try another ecu if you can get a hold of one. Another thing to test would be the IAC valve(idle air control valve). This should be located on the back side of your throttle body. |
What's the difference between understeer and oversteer?
Understeer is when the driver is scared.
Oversteer is when the passenger is scared. |
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stockvn
P Plater
12 Posts
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Posted - 17 Aug 2007 : 7:55:20 PM
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the pump kicks in for a few seconds then i try to start it ..i will try a diff ecu but i did run a different on but was no resetting it i have 5 spare ECUs ,,how would i test the iac ? so the oil pressure switch is this the same on that works the oil light if it has one??
could i have a stuffed oil pressure switch and i have to crank engine for it to build up? when cold the oil is thick ond starts fast when hot it would be thin then drains back into sump?? stuffed oil filter it makes you think?? last will this forum work on the new windows vista becouse i cant log on my new pc even if i log out on this one first?? |
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stockvn
P Plater
12 Posts
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Posted - 18 Aug 2007 : 1:22:34 PM
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| disconected the sensor next to the oil filter and one single wire one an inch from that and the car still runs and starts with old problem so if the oil pressure controls the fuel pump how come i can drive around with both oil sensors unpluged?? i also unlpluged the idle control plug while the engine was running and it stalls the car so it must be working.. |
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