Misfire question

[deejay]

I have a 1970 l16

When I start it up in the morning or after sitting for awhile it starts up rough

Like misfiring on # 2 cylinder

I have a new electronic ing. ( took the points out )

New plugs wires and cap and roter

Checked the compression and across all calendars there all about even with in

2-5 psi of each other

 

After it warms up usually does better gets about 27mpg

Little sputter here and there

Also has a webber carb

 

Any ideas what could cause this

[datzenmike]

Is it new or used? Do you have any idea what this mystery weber was off of? Used, it could be full of someone else's problems like missing or mixed up parts. It could be jetted for a much larger motor.

[deejay]

The webber came with the car running in the motor 36/32 manual choke

[Busta Nut]

Does it only mis on #2? Datzenmike is right also. I've learned a ton recently by getting familiar with your carb. This will help:

 

http://www.google.com/search?tbm=isch&source=mog&hl=en&gl=us&client=safari&tab=wi&q=dgv%2032%2F36&sa=N&biw=480&bih=208#i=5

[banzai510(hainz)]

How you know its number 2??????????

you pulling the plug wire on #2 and it dosent change? Thats the only way to tell.

 

cheak the intake /exhaust vlave lash

replace #2 spark plug

ck the plug wire

[datzenmike]

Carb motors often start up 'rough' when cold compared to EFI motors you may be used to.

 

How did you determine #2 plug was a problem? Like Hainz sez could be a tight valve.

[deejay]

Ya. Pulled # 2 plug wire no change also changed plugs and wires and if I pull any other plug with # 2 plugged in its a big change compared just pulling # two

[deejay]

The carb is tuned in just pump gas a few times pull choke a little and drive and usually half mile down the road u can just push the choke in and go even when show is on the ground ez starts I'll be checking the valves this week

[banzai510(hainz)]

trying agine here

You ck the valve lash or lash pad if its still there.

This is a simple fix.

 

 

sell me your car for 250$

[deejay]

Any idea of the feeler gage intake exhaust # off the top of your head

[datzenmike]

If the compression is the same as the other cylinders then it should fire just like the other cylinders. If you pull the plug wire off and not much change then the spark is going somewhere else. Try swapping the #2 wire to another cylinder and see if the problem moves. If it does the wire is bad. Try swapping the plug to another cylinder and see if the problem moves. If it stays the same put a new dizzy cap and rotor on it.

[banzai510(hainz)]

rockauto.com has nice NGK wire sets for 17$ Buy a couple sets- NE64