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Old 01-31-2015, 05:22 PM   #1 (permalink)
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Default rebuilt engine very rough idle

so i got a rebuilt d16 i got it to crank with the spark plug wires not in the correct firing order but when i put them in their correct place it will not crank
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Old 01-31-2015, 05:52 PM   #2 (permalink)
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More info please.

The more info you give us, the better answer we give you.
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Old 01-31-2015, 06:58 PM   #3 (permalink)
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it will stay running as long as i keep my foot on the gas but when i let off it will died. its a z6 head on a y8 in a 2000 civic hx
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Old 01-31-2015, 07:05 PM   #4 (permalink)
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Can of worms.......


More information is needed but it sounds like you put an obd1 head on and obd2 block.
Check to make sure it's time right.

Next you put a normal vtec head on a car with a vtec -e ecu.
So the vtec is probably staying on.

Also the hx injectors are suppose to be 190cc so if you some how put in the z6 240cc injectors your be flooding the car with fuel.
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Old 01-31-2015, 07:12 PM   #5 (permalink)
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has eagle rods vitara pistons. 57 trim turbo on a basemap for 10psi til i get it to the dyno. head is stock. chipped p28. has 2 step colder ngk bk7re spark plugs. wires and distributor are good. has dsm 450cc injectors with resistor box. it has a y8 cam gear and a walbro 255 also

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Old 02-01-2015, 03:55 AM   #6 (permalink)
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well come on!



make sure your mechanical timing is correct and that you have the right cam gear,

you also said it will run with plug wires switch around so check that your dizzy is no 180deg out...
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Old 02-01-2015, 10:06 AM   #7 (permalink)
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ok so i can get the motor to idle but when i give it gas to take off it dies. and i did have the dizzy 180 out and fix that. it will fire up with just a tap of the gas pedal and idle.
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Old 02-01-2015, 10:37 AM   #8 (permalink)
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Mech-an-ic-al ... timing.

Why are you running a y8 cam gear on a z6 head ... it will have the wrong timing marks ... I think. The only time you start swapping those cam gears (IIRC) is to account for the lower deck height on a d15 block, other wise run the cam gear for the head you've got.
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Old 02-01-2015, 11:13 AM   #9 (permalink)
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Check engine light on? What map sensor?
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Old 02-01-2015, 12:42 PM   #10 (permalink)
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yea i just ordered a adjustable cam gear and stock map sensor but ill change it out with another one to see if it helps. and the guy i bought the motor from had the y8 cam gear on their so idk and yea engine light is on i know because of o2 sensor but i need to check it for other things
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Old 02-01-2015, 12:42 PM   #11 (permalink)
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I'm guessing your mechanical timing is off but it's hard to know for sure..

If you check ignition timing with a light, it can also give you a ballpark of your mechanical timing.. like if you have to max the dizzy one way or another to get the right ignition timing then you probably want to check your mechanical timing.. etc..
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Old 02-01-2015, 01:12 PM   #12 (permalink)
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@thesteelbreeze yea that how i figured out i needed a adjustable or z6 cam gear. i also think the basemap im running is some bs might order one from phearable after cam gear install. but overall the motor sounds good. no valve tick no knocking from the block. i have acl racebearings.and this was my first motor build lol
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Old 02-03-2015, 02:18 PM   #13 (permalink)
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now it wont start at all i pulled the spark plugs and they were black and smelled like gas.
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Old 02-03-2015, 03:29 PM   #14 (permalink)
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Quote:
Originally Posted by ahardy25 View Post
now it wont start at all i pulled the spark plugs and they were black and smelled like gas.
post a pic of the firing order.
if the plugs are black then they arent sparking and you got fuel
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Old 02-03-2015, 06:33 PM   #15 (permalink)
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yea i had them in the right order and i know the dizzy has to work cause the car fired up yesterday and earlier then i did something.i may have flooded it and if my chipped p28 isnt working correctly it wouldnt be able to handle my 450's right? and the car wouldnt crank becasue of too much fuel? im gonna check the mechanical timing tomorrow and get everything ready for the adjustable cam gear.
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Old 02-03-2015, 06:44 PM   #16 (permalink)
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Dont wash out the cylinders, you wont be happy with yourself if you do.

Now that that is said, check your oil.
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Old 02-03-2015, 07:01 PM   #17 (permalink)
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im going with whatever "basemap" it is..

Sounds like you need a tuner and the correct timing,cam, and tune.
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Old 02-03-2015, 07:11 PM   #18 (permalink)
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Mechanical timing is off(wrong cam gear). And you will need to reset ignition timing once mechanical timing is established. You probably will need to change your oil because it probably has a bunch of fuel in it.
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Old 02-03-2015, 09:09 PM   #19 (permalink)
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alright thanks will change the oil as well and let you guys know what happens
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Old 02-04-2015, 09:37 AM   #20 (permalink)
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the timing was so far off dang. idk if you can see and the rotor on the distributor was 180 out
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