three things I can think of. 1. is your adx file setup for 0* 2. is you balancer slipping on the rubber sleeve? 3. is it the correct timing mark for that balancer (there are two that I know of).
three things I can think of. 1. is your adx file setup for 0* 2. is you balancer slipping on the rubber sleeve? 3. is it the correct timing mark for that balancer (there are two that I know of).
87 4Runner, 15" spring lift, 3" body, chevy vortec 355, 5.29 gears, 38.5x15.5x15" Boggers, 280hr, 16168625 running $0D
93 S10, 36x12.5x15 TSL's, custom turbo headers, 266HR cam, p&p vortec heads, $0D Marine MPFI with 8psi boost.
05 Silverado, 2' lift, 4" exhaust, Bully Dog programmer,
Don't understand the adx file setup thing. Relative newbie at TunerPro. 16197427 ECU seems over complicated, and strange terminology, in TunerPro. Can you shed any light. The timing issue is that what TunerPro reads and what is seen on the balancer with timing light are TWO different things. Go figure. Took extra care to index the graduated balancer on the engine. Stuck and object into cylinder number 1 to ascertain top dead center, then adjusted custom timing pointer to zero. Maybe one or two degrees off, but that is minor. Balancer is Fluidyne. No rubber sleeve to slip. Prefer Fluidyne balancers as most effective type for balancing throughout RPM range. Others resonate, not good, at differing RPMs. Fluid does not resonate it dampens resonation.
Beginning to suspect EMI/RFI interference on the Knock Sensor input line. Lots of AC noise measured on the Knock Sensor wire. Should be a way to nullify the knock sensor input.
Comments please.
How far off is it? What does tunerpro say and what are you reading on the balancer?
79 Jeep Cherokee, AMC 401, T-18 manual trans, hydroboost, 16197427 MPFI system---the toy
93 Jeep YJ Wrangler, 4.0L, 5 speed, 8.8 rear, homebrew hub conversion and big brakes, hydroboost, 2.5in OME lift, 31x10.50's---the daily driver
99 Jeep WJ Grand Cherokee limited, 4.0L, auto, 2wd, leather and power everything, 99% stock---the long distance highway ride.
Timing light on the balancer reads from 0 to 10 degrees advanced. TunerPro says everything from 14 to 27 degrees of advance based on RPM and other parameters. Last evening inserted 3.3 Kohm resistor in series with knock sensor wire to ground. Measured DC and AC volts. DC was 2.1 and AC was low millivolts which is very good. Routed the knock sensor wire away from spark plug wires. Suspect they have high EMI radiation level inducing noise into adjacent wiring. May reroute TPS and MAP wires also. Would like to replace with twisted shielded cable to keep EMI noise out.
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