Reddit reviews Actron CP7677 AutoTroubleShooter - Digital Multimeter and Engine Analyzer for Automotive Professionals, Orange
We found 3 Reddit comments about Actron CP7677 AutoTroubleShooter - Digital Multimeter and Engine Analyzer for Automotive Professionals, Orange. Here are the top ones, ranked by their Reddit score.
Actron's professional level meter performs all standard electrical and automotive specific tests for on-car and on-bench troubleshooting, including: tach, dwell, volts, amps, ohms, continuity, and diode testsTests starting and charging, ignition and fuel delivery systems, and helps locate faulty wiring and componentsExtra-large, easy-to-read digital LCD display features on-screen test leads connection reminder, automatic reverse polarity indication, low battery indicator, and hold button to retain display dataUL and ETL listed tool has automatic zero adjust, overload protection on all ranges, 10 MΩ impedance, and is switchable between 4, 6, 8 cylinder modesIncludes: protective boot, fold-out stand, detachable color-coded test leads, alligator clips, quick start guide, and detailed downloadable instructions in English, Spanish, and French
I used the multireader!
It showed power from the middle brake light but not from the left brake light.
It allows you to measure electrical currents. Cars have a range of current, or ohms, or other figures and you can use a multimeter to see if the parts are good or not.
One that reads RPM can also help you set things like idle properly .
I use this one
https://www.amazon.com/Actron-CP7677-Automotive-TroubleShooter-Multimeter/dp/B0002LZU7K/ref=sr_1_8?keywords=automotive+multimeter&qid=1570649424&sr=8-8
and its excellent
I use this thing: https://www.amazon.com/Actron-CP7605-Tachometer-Voltmeter-Analyzer/dp/B00062YUUS/ref=cm_cr_arp_d_product_top?ie=UTF8, which looks like it's out of production. But this thing looks alright too...https://www.amazon.com/Actron-CP7677-Automotive-TroubleShooter-Multimeter/dp/B0002LZU7K/ref=sr_1_2?keywords=dwell+tach&qid=1557710630&s=automotive&sr=1-2
I think on your model you just connect it to the battery (mine goes on the coil however). The directions should say how to hook it up. Generally you just set it to "4 cyl." and it should read somewhere between 600-3500 rpm.
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If we think it's the carburetor (choke specific), it's important to rule out anything else. Here's a list of things to check before adjusting the carburetor:
- NO vacuum leaks. This includes intake & exhaust manifolds, carburetor base, pcv hose, brake booster hose, AND all 3mm hoses like the vacuum advance or smog lines. Vacuum leaks can mess with your idle speed. Basically anywhere there's a vacuum connection, make sure it's not leaking. I like to replace all rubber and spray carb cleaner around metal connections.
- Timing and distributor air gap. You can set these things even with the fast idle you've got. It just has to be running (unless you do a static adjustment, which I don't know how to do). Just get a timing light and some brass feeler gauges. Timing = 8deg BTDC, Air Gap = .008" to .016"
- Valve Adjustment. As the engine is recently rebuilt, this probably isn't an issue. Anyways: Intake = .008", Exhaust = .012", HOT.
- Float Level. Look at the glass on the front of the carb. The fuel level should be right in the middle. If it isn't take the top off the carb, flip it upside down and do this: https://board.marlincrawler.com/proxy.php?request=http%3A%2F%2Fi94.photobucket.com%2Falbums%2Fl104%2Fspcmike%2FDSC03557.jpg&hash=77ab726ca7e4065975c0b98df09b6f94
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Questions: You say it sometimes won't idle at all at startup. Will it idle once warm? If so, does the idle go down to more of a normal speed when warm? Also, when it doesn't start correctly, is the engine hot or cold?
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It could be that both the choke adjustment and the basic idle adjustment are off. It may be that they're adjusted for the old, worn out engine that you rebuilt, which is why it used to work. It shouldn't be too hard to adjust. I like to do the idle first, then choke. If you need any more info, I'll be around. Best of luck.