I have a Bosch ignition rotor which has resistance of 1KΩ stamped on it as. I measured the resistance of the rotor and I'm getting 1.1KΩ. Will this variation cause the car to run rough???

__________________

1990 190E 3.0L

Doubtful. Ignition rotors tend to fail outright. Not saying impossible but I'd go as far as unlikely. Never hurts to have fresh parts though I'd keep digging before dropping $$$ on a cap and rotor.

__________________

90 300TE 4-M
Turbo 103, T3/T04E 50 trim
T04B cover .60 AR
Stage 3 turbine .63 AR
A2W I/C, 40 LB/HR
MS2E, 60-2 Direct Coil Control
3" Exh, AEM W/B O2
Underdrive Alt. and P/S Pulleys,
Vented Rear Discs, .034 Booster.
3.07 diffs 1st Gear Start

90 300CE 104.980
Milled & ported head, 10.3:1 compression
197° intake cam w/20° advancer
Tuned CIS ECU
4° ignition advance
PCS TCM2000, built 722.6
600W networked suction fan
Sportline sway bars
V8 rear subframe, Quaife ATB 3.06 diff

The rotor on points equipped vehicles is 5k Ohm. Does that answer your question?

On CDI systems the is no resistor just a plain metal arm. Why? Heat. A CDI system will fry a 1, 5, or any other resistive rotor arm in short order.

The resistance is there to squelch the radio interference.... plus boost the spark.....coil needs to push harder to shove the electrical pulse down the system. If you use MSD coil wound ignition wires they have a 1k ohm resistance per foot IIRC.

Most OE ignition systems are crap....until we got COP.


.

__________________
[http://languageandgrammar.com/2008/01/14/youve-got-problems-not-issues/ ]

"A liberal is someone who feels they owe a great debt to their fellow man, which debt he proposes to pay off with your money."

On the other hand, cap & rotor are standard maintenance and not all that $. Just make sure to get the right one, by a quality manufacturer. If that is not the issue you have a spare, it is the issue, throw that away

A variation in the measured resistance of commercial resistors, made with a non-laboratory grade ohmmeter, of +/- 10% is entirely within spec. That variation from the marked value is not the source of any problem.

All ignition components are new, and idle air control valve hoses are new, but I am getting a fault code 11 air injection system and the car runs rough when put into drive or reverse.

__________________

1990 190E 3.0L