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gq 4.2 petrol wont start

Tech Talk for Nissan owners.

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gq 4.2 petrol wont start

Post by racehorse »

have a gq shorty went through a puddle and was missing badly got it home and now wont start whats the first things i should check so i dont spend money on pointless shit that dosent need replacing and also want to get the carby rebuilt were a good place to take it or can someone on ere do it
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Post by big red »

dry the distributor cap out as water may have got inside.
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Post by racehorse »

even though it has been sittin for like 2 months will still be wet
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Post by waandy »

are you getting fuel and spark? i have had to tip a lil petrol down the top of my carb before to get it to start, are you on lpg or petrol, auto choke working?
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Post by racehorse »

is on petrol and choke is getting stuck on all the time thats why want rebuild the carb and how do u check for spark just take the lead off and look also wat a good gap seting for the plugs
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Post by racehorse »

is on petrol and choke is getting stuck on all the time thats why want rebuild the carb and how do u check for spark just take the lead off and look also wat a good gap seting for the plugs
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Post by waandy »

just put an old plug or something metal and see if it will ark to your botor as you turn it over
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Re: gq 4.2 petrol wont start

Post by RN »

racehorse wrote:have a gq shorty went through a puddle and was missing badly got it home and now wont start whats the first things i should check so i dont spend money on pointless shit that dosent need replacing and also want to get the carby rebuilt were a good place to take it or can someone on ere do it
Pull out the high tension lead from the coil...check for crap build up in the coil connection point. I have found a build up of muck in there which affected the performance of the spark from the coil to the distributor.
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wont start

Post by choppedtrol »

also remember these motors are points distributer. have a set of points down the bottom. if on lpg too good thing is to set plugs at .8
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Post by jessie928 »

check the dizzy cap for water but more importantly check the condensor, which is possibly farked now.

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Post by racehorse »

took dizzy off was dry but there was a lil mud in there and there mud in the air box just a lil though will check it for spark on thurs still no recomendations on a shop to rebuild my carb
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Post by cooki_monsta »

yep i only know one in melb, does ur motor kick over, its not hydro locked is it?
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Post by racehorse »

na melb to fer to go dont no wat hydro locked is but yes it does turn over fine just wont start
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Post by racehorse »

na melb to fer to go dont no wat hydro locked is but yes it does turn over fine just wont start
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Post by Reddo »

dizzy cap off and clean for water/crap

flip dizzy cap upside down, and check the dizzy cap contacts (6 of them) and the rotor button, and make sure they are clean, and making a good contact.

check points gap?

Check spark on coil lead, and then spark plug leads

Check fuel line, and make sure the pic up in not blocked

make sure there is fuel getting into the carby

Get some Aero start and spray into the air intake and see if it will go.
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Post by Reddo »

racehorse wrote:na melb to fer to go dont no wat hydro locked is but yes it does turn over fine just wont start
when you get water into the cylinder's and the water, which is not combustible, locks the motor, and wont turn over.


Has the car got an imoberliser/kill switch on it?
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Post by racehorse »

na the motor isnt siezed still turns over fine ill check for spark when i can get someone to turn it over while i look
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Post by racehorse »

if i got the spark plug outand im turning it over how often should it spark
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Post by striga22 »

it should spark a fair bit. check all the solnoids if they are clicking to your fuel pump try a test light on your coil positive side you should be able to have power there while the key is on. does it smell like fuel after you have been cranking it over?
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Post by GUtripper »

racehorse wrote:if i got the spark plug outand im turning it over how often should it spark
hold the HT lead in your hand whilst your mate turns it over.
If you leg kicks a bit then hurts, ya got spark. Geez............... :roll:
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