DIY027 My Engine is running rough..What do I do?

Post your Tips Tricks and How Tos
Post Reply
User avatar
Air Education & Training Command
Air Education & Training Command
Posts: 153
Joined: Wed 24. Dec 2008, 06:03
Gender: male
Music instruments you're playing: Acoustic Guitar ... when I was young
Location: South Jersey 08062

DIY027 My Engine is running rough..What do I do?

Post by 59lincolnrag » Fri 12. Aug 2016, 16:43

OK .. so lets begin.
...How old is the fuel in the tank?
What is the condition of the fuel lines?
Check the firing order. Inspect the cap and rotor. Are there carbon tracks or discolored / burnt terminals? replace.
What about the plugs? Are they blackened with soot? Is the gap correct? clean with a brass brush or replace with the correct part.
When the car is running and you slowly close the choke plate does the engine speed up? Himmmm sounds like a vacuum leak.
....spray some carb cleaner around the base of the carb ...does it speed up? If yes that indicates a leak at the gasket or spacer plate. Examine the carburetor base gasket. Has the spacer been removed and cleaned?
Replace the gasket between the spacer plate and the intake manifold. ...DO NOT OVER TIGHTEN THOSE BOLTS!.
Look for broken or disconnected vacuum lines.
If the car has been sitting close to a year or more remove the gas. Add fresh gas 5 gal is good. Do you have fuel pressure ? Install a gauge if you have one how much pressure ? Does it meet spec?
When running you can adjust the carb (2 screws) mixture and set the idle to 800 RPM. After warm up re-set the mixture and idle. Set timing 4 degrees more than factory setting with the vacuum advanced disconnected and plugged. Reconnect the vacuum advance and re-set the idle to 800 RPM.
If the car has sat for a long time you will have multiple issues ...starting with the fuel...
If your sure its a miss fire ...Then ..disconnect the coil (12 volts). Remove the plugs.....charge the battery ....Remove the vale covers. Using a starter button crank the motor and watch the valves / rockers opening and closing. Is everything working ?? Look for a stuck valve ...bent push rod....broken rocker arm... You can also do a compression test at this point...

Just some ideas .....Hope it helps.
2002 Lincoln Blackwood Black on Black on Black on Black ...did I say Black...
2007 Mercury Gran Marquis
1959 Lincoln Continental Coupe (blk on blk)
430 Tri-Power Super Marauder
1959 Lincoln Continental Convertible (wht on wht)

Airman basic
Posts: 1
Joined: Tue 5. Sep 2017, 19:19
Gender: male

DIY027 My Engine is running rough What do I do

Post by Petermup » Sun 10. Sep 2017, 12:51

Is there a DIY or thread I searched about modifying stock engine covers to fit on a whipple?

Thanks in advance

Post Reply

Return to “Tutorials Tips Tricks and How To. Written By Board Members”

Who is online

Users browsing this forum: No registered users and 1 guest