• Jun 09, 2020 · I recently acquired a 1968 Chevy truck with what is probably a replacement 350 motor. It had sat a long time and was in unknown condition. I thought it might run if it could get fuel and spark.
  • 1996 Chevrolet K1500 6.5TD 4x4: 4L80E Trans, 3:42 Gears, GL4 Programmer, Turbo Master, HD Lift Pump, Autometer Boost and EGT, High Idle Switch, Vac Pump Delete, "F" Intake, exhaust coming soon. 1991 GMC Sierra 1500 Reg Cab Shortbox 2WD:
  • Techno’s “Know your car” Series # 10 Mazda MX-5. What Happens When the Timing Is Advanced It has long been held, and demonstrated at the Club's Dyno Days, that advancing the timing to 13 to 14 degrees before top dead centre (BTDC) is a cheap way of achieving lower rpm performance in the Mazda MX-5 1.6 litre cars.
  • There is no knock at idle and it idles rough. It is a 350 with over 200,000 miles on it. I am sure it is low with all the wear, but it still had a lot of power. 1994 Chevy K1500 213000 miles on it. The truck has been starting to bounce around when idleing in park and when you are in gear at a light or stop...
  • The motor is a 350, and has proven itself for many years to be reliable. It has a 750 Holley 3310 (vacuum secondaries), Holley 110 GPH mechanical fuel pump, Edelbrock Performer RPM intake, 14" x 3" K&N Filter, HEI distributor, Heddman headers, TH-400 trans.
  • Most of the carburetors installed on the 350 use a single air/fuel mixture screw, while some carburetors use two. The general rule of thumb is to tighten the adjustment screw(s) into the carburetor with a screwdriver while the engine is idling until the engine speed starts to increase, then loosen the screw(s) half a turn.
Sep 04, 2014 · it is been experiencing a very rough idle, backfire with flame coming out of the throttle body. bad timing. Setting timing for each specific engine is different; you must refer to the appropriate procedure for setting ‘base timing’ for that particular engine.
Exceptions to this are GM carburetors with the idle speed air screw, and end carburetors on tripower. Setting the idle for the highest vacuum idle reading will result in too little clearance of the throttle plate; forcing too much of the idle mixture through the lower idle port and too little through the idle transfer slot.
Jun 25, 2007 · Question: I'm having a problem with my engine bogging at 5,000 rpm in Second gear and 4,000 rpm in Third. I think it could be one of two things: my intake manifold or rearend gear ratio. It's a ... Higher-than-normal vacuum at idle is a common clue to overly advanced ignition timing, while low vacuum can indicate retarded timing. Low vacuum also can be an immediate clue to a plugged exhaust. To check further, run the engine at about 2500 rpm for about 15 seconds.
Question: 1994 Chevy 350. Backfires when accelerating. Question: I have a 2003 Chevy Venture that backfires through the air filter housing on acceleration. I'd suspect a vacuum leak since RPM is dropping at idle and unplugging the regulator hose helps you fire up the engine.
May 23, 2016 · Backfiring through carb and getting worse, even at idle Discussion in ' Carb Fuel Systems ' started by rumblebox , May 23, 2016 . May 23, 2016 at 12:20 AM #1 Jan 26, 2009 · I did a search, but couldn't seem to find the same problem I am having. My car has been sitting for about 5-6 months, so yesterday I go to start it as I am starting to get it ready for autocrossing. I had to jump start it, but it fired off right away & idled great (I was impressed). I let it idle for a little bit, maybe 10 min, then went to ...
Jul 14, 2014 · Cause: Some stern-drive engines have flapper valves inside the Y-pipe to prevent water from entering the engine through the exhaust. When the valve is worn, the exhaust beats the valve against the pipe, producing a metallic sound. Aug 02, 2017 · Remove the high tension wire from the center tower on distributor cap and ground. Crank over engine – if there is no fuel discharge from the fuel line, check for kinked or bent lines. Disconnect fuel line at tank and blow out with air hose, reconnect line and check again for fuel discharge. If none, replace fuel pump.

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