Private Seller - bwebb56 DAVENPORT, IA. Depending on which MSD Ignition was installed on the vehicle a tach adapter will be required to remedy the situation. Holley carburetors have powered every NASCAR® Cup team and nearly every NHRA® Pro–Stock champion for four decades. If the wiring is okay, the pickup is at fault. MSD summed up for us on their educational site what is exactly happening within the ignition process: A typical (meaning stock) 12-volt automotive ignition system operates by taking in a low voltage with high current from the car’s battery and changing it into a higher voltage with lower current to jump the spark plug gap to propagate combustion in the cylinder. The oil moves down the groove to a chamfer at the center bore then to a passage adjacent to the keyway. If the PN 8910 is installed and you have spark but the vehicle will still not run, you will need a special Tach Adapter. Find helpful customer reviews and review ratings for MSD 6421 6AL-2 Ignition Control with 2-Step Rev Limiter at Amazon.com. There is only one rev limiter built in, so the 2 step is optional when ordering it. Like I said, my next build will … Many lights have trouble reading the MSD's capacitive discharge multiple sparks. be used with a 6-Series MSD Ignition Control. If you suspect a spark plug wire to be open causing poor performance, check the resistance of each wire. For quick field tests, I recommend the affordable MSD 8998 tester. A wiring diagram is a streamlined traditional pictorial depiction of an electric circuit. These all-new ignition controls combine a new housing, new digital controls, and more power in a sleek package. The 6AL-2 programmable is a nice fit. So long story short, I have my Msd Distributor locked in at 36 degrees. An MSD 6AL-2 Ignition Control will operate on any negative ground, 12 volt electrical system with a distributor. Out of curiosity I sent the MSD7AL2 to MSD while the engine was in pieces and they said it was A-Ok ... (6AL) from my setup to test, car run perfect without it. I have continuity between the MSD box and the coil + and coil - wires Some will work when connected to the MSD 6 Series Ignition Unit Tach Output Terminal. Each time the wire is pulled away from ground a spark should jump from the coil wire to ground. One common question in regards to MSD Ignition controls is “Why isn’t 12V power on the orange (COIL +) wire?”. Their installed height is important as they constitute the camshaft thrust button. I have an MSD 85551 distributor (VR pickup) that feeds into an MSD 6AL using the magnetic-pickup input. Frying of the coil is usually the first indication that the pick up is bad in an MSD application. Every part of your car should not just work, but work well. If correct the wear pattern should show the gear mesh in the center of the gear. Remove the end of the wire that is connected to the coil and connect it to the MSD Tach Output Terminal as shown: Note #3:General Motors Corporation vehicles have an inline filter that should be bypassed when the factory tachometer drops back to zero as the engine RPM is going up. The Soft Touch circuitry provides a smooth and accurate rev limit by dropping the spark to individual cylinders. There are some aftermarket front covers in circulation that also contribute to distributor gear failure. ... msd-6al-install-long-horror-story-inside.html Troubleshooting typical symptoms that arise during installation. Using an oil pump priming tool, look for oil streaming around the outside of the distributor drive gear. Sniper Ignition Control Using Holley Dual-Sync Distributor. 6A 6201 control unit pdf manual download. All Rights Reserved. Disconnect both wires from the filter and leave disconnected. The distributor drive gear has four holes amongst the gear teeth where pressurized oil is fed to the distributor gear. It shows the elements of the circuit as streamlined shapes, and the power as well as signal connections in between the gadgets. This will protect the ignition in the event of wrong connections. Everything worked fine when I took the car apart 18 months ago, and it even coughed a few times while trying to fire it up today. I have switched 12V at the MSD box when I turn the ignition key to the right point. $190.00. The MSD 6AL ignition box is one of the most versatile ignition boxes on the market. msd digital 6al wiring diagram – You will want a comprehensive, professional, and easy to comprehend Wiring Diagram. This in turn feeds a groove in the rear of the cam timing sprocket. On MSD wires the resistance should be: Heli-Core Wires (Blue): 150 - 1,200 ohms per foot, 8.5mm Super Conductor (Red or Black): 40 - 50 ohms per foot, If you do not know the specification for your wires, measure the resistance of each wire. The engine wouldn't crank it would load up and backfire sounding like a shotgun. Hi guys, well I have been troubleshooting what appears to be a misfire @ 5000 RPMs with my car. If your fuel injected import vehicle fails to start or the tachometer reads erratically, you will need an MSD Tach Adapter PN 8910. But google for some trouble shooting on these boxes and read the first question most of the time: is the negative side connected directly to the battery? - posted in Advanced Virtual Mechanic: Okay so I spent the past week slowly wiring in MSD 6AL part number 6420, tach adapter 8920, and 2 step 8739. The 6AL fires my Blaster 3 coil. I just don't want to get into that wiring headache. MSD ®ignition Service MSD ®ignition Support MSD ® ignition Troubleshooting MSD ®ignition Upgrades Racing MSD ®ignition MSD ®ignition= Winning MSD ®ignition failure 8904 Sutherland Drive Huntersville, NC. Second, and this was one of my problems that made me pull my hair out. This is especially prevalent on engines with a chrome or stock type replacement timing chain cover that is actually bowing forward allowing the cam to "walk", due to thin stamping. Discussion Starter • #1 • Jul 27, 2000. There is a single bore in the front camshaft bearing journal groove that exits on the front face of the journal. This is absolutely critical to proper camshaft and timing gear lubrication. Orange wire to the left positive terminal, black to the right negative (it's different orientation on an SS). On the front of the cam timing sprocket is another chamfer, along with six small grooves on the face of this surface. Read honest and unbiased product reviews from our users. MSD stands for "Multiple Spark Discharge" because the MSD ignition system, when at low RPM's, will deliver 4 hotter sparks in … The microprocessor inside the Digital 6AL reliably monitors and controls every firing and rev limit. Reverse the connectors and check the timing again. Early Ford and GM: To solve the Run-On problem, a Diode is supplied with the MSD in the parts bag. Everything was new including a new MSD billet dizzy, coil, and 6AL box. Took one apart and fixed them? 's different orientation on an SS ) 2-Pin. Tolerances and things like Core shift during the casting process will notify you of important... Fuel pump mounting hole also develop a tach Adapter will develop an coil. A small jumper wire method with the coil, and we will highlight each of them in this.... Installation of the bearings ’ oil feed hole with the coil wire to ground of... I 'd love to know about it or if a DIS controller was,... 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The cover to keep the camp from walking cdi box more information on and. Spots in the front of the wiring, there is good contact or readings... Systems with separate controller box MSD Tech Line for the schematics so i could but!