weird start up problem...help

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poshatch
Posts: 853
Joined: Thu Oct 15, 2009 7:44 am
Car: p.o.s. 1990 240sx hatch

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hey all,

so recently i have had this problem with my car and it just got progressively worse to the point where it is now

i would turn the key and the car would start right up no problems, then it would rev down, bog, and die

when i go to start it again it just turns over and over and over and wont start

i tried it today for a long while and still nothing

i suspected that it was a spark problem so i checked all conections for spark, all good, then i checked for a vaccum leak, couldnt find one, then i took out my spark plug to see if it was gunked up, it wasnt and still had a ok gap no bridging

while the plug was out i saw that i had flooded the cylinder with gas from trying to start it up so much

so now im waiting for it to evaporate right now but i dont know what it could be...

i was thinking maybe the cap and rotor were worn and i wasnt getting a good spark... any thoughts? or my friend and suggested an o-ring

what i would do sometimes when is saw it starting to bog was to rev it a bit for like 30 seconds and then after that it would idle perfect and no problems...

any help would be great thanks!


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OutToWinPAHC
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Did you mess with the timing at all? Maybe its off, check the cap and rotor and see if you can get a timing light on it.

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poshatch
Posts: 853
Joined: Thu Oct 15, 2009 7:44 am
Car: p.o.s. 1990 240sx hatch

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no i hadnt messed with it at all, and it dosnt idle or run bad at all, pulls hard, just this really weird thing on start up only

the only thing i can figure is that it just isnt making a good conection and would need a tune up

kc240guy
Posts: 425
Joined: Thu Jun 29, 2006 3:31 pm
Car: gold s13 and a maxima

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mine right now on first start up bogs for like 10 seconds. I haven't looked into it cuz it's only once a day. So now I'm interested, I don't want it to fail on me.

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poshatch
Posts: 853
Joined: Thu Oct 15, 2009 7:44 am
Car: p.o.s. 1990 240sx hatch

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so i seemed to have fixed the problem

i can only assume that it was a combination of a bad spark and lack of air, the iacv was pretty much closed so i opened that up a bit to see if that might help, did a bit

then just changed the spark plugs after check the distributor cap and rotor which were fine and bam...no problems at all

it was such a weird problem though, the sparks didnt seem that bad, they wernt bridged or anything and the build up didnt seem bad but i guess it was bad enough to not function correctly cold


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UpSlideDown510
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Joined: Wed Nov 04, 2009 7:42 am
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my car is having the same problem. i guess ill try what you did.


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