I have awful ignition noise in the Jeep described above. It is so bad that I cannot hear any station on AM when the engine is running. FM radio is fine.
What are the most likely culprits please ?
Thanks for any tips !!
--James--
news.individual.net did pass the time by typing:
Ground (rotted engine ground strap, radio ground, etc) (try a jumper cable between frame and block) failing sparkplug wires, cracked plugs, or arcing in the cap. condenser (for those who still remember points) :) worn muffler bearings
Usually alternator and ignition are the first suspects. Also could be the blower motor. Make sure you have the proper spark plug wires and plugs. Check all of your connections for the stereo and also, don't run any speaker wires parallel with power wires. Keep them as far away as possible.
Chris
I was trying to save myself from neRvc.38$ snipped-for-privacy@twister.rdc-kc.rr.com, but wouldn't let me go...
If it works fine in FM and not AM, the tuner is prolly shot...is it a stock unit, ot aftermaeket...swap it with another (wifes/friends/whoever) and see how it works then...
I was trying to save myself from snipped-for-privacy@cox.net, but wouldn't let me go...
| Not using spark plugs with the first letter of their | nomenclature being "R" for radio restrictor. | God Bless America, ßill O|||||||O | mailto: snipped-for-privacy@aol.com
Ha, you said "nomenclature."
Well, it is a bit hard to believe that my "tuner is shot", given the fact that it picks up am crystal-clear WHEN THE ENGINE ISN'T RUNNING and causing the strong ignition noise.
Thanks for the other remarks, I am suspecting ignition noise such as plugs / plug wires/ etc etc.
--James---
---------------------------------
If it works fine in FM and not AM, the tuner is prolly shot...is it a stock unit, ot aftermaeket...swap it with another (wifes/friends/whoever) and see how it works then...
I would first double check to make sure the antenna wire connector is shoved all the way into the back of the radio. If the shield portion of the mororola connector has slipped out it will pick up ignition noise quite efficiently.
If you have checked to make sure that all the plug wires are seated correctly, and your engine block grounds are all good, it might be time to replace the ignition wires, plugs, distributor cap, and rotor. Not sure if that vintage system uses points or not! I haven't had a car that had points since I sold my 69 V6 CJ5.
Anyway, I have done a lot of work on ignition noise suppression in my jeep to accomodate my radio gear and have found that the usual replacement ignition wires from places like Autozone are not up to the task as far as suppressing noise. I ended up buying a set of magnecor wires and ended my noise problems 100%. They work great and look pretty too! They are not carbon resistive, they use a ferrite core with an inductively wound conductor over the ferrite. Stops RFI in its tracks, and as a bonus, they do not break down over time as carbon wires do. A pre-cut set for my 4.0 liter engine ran around $65.
Ender
Make sure you're not running low or no-resistance spark plugs or ignition wires. Those will cause a HUGE amount of noise to be generated that an AM radio easily picks up. Use only resistor-style spark plugs and carbon-impregnated resistor type (RFI suppression) ignition wiring. "Performance" ignition wiring and non-resistor type spark plugs are responsible for 99.9999% of all the kind of noise your AM radio is picking up.
Jerry
Thank you Ender, Jerry, and others for these helpful responses !!
--James--
MotorsForum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.