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  #1 (permalink)   IP: 41.122.155.82
Old 2010-04-19
Streaker Streaker is offline
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Default A crazy fact, that is driving me crazy-ZR4 question

I recently installed a zr4 onto a old model Toyota. We taped the front heads as suggested by Mem-tek, but also the back one (not suggested).

Every time the car is accelerated fast ie first to third gear full power runs, the rear warning goes off. Or if car is revved in neutral. Everything, I can think of bar for removing the tape on the rear transponder has been done. Relocated all components away from electrical points ect. Could the lack of suppression on old cars create false warnings? (thinking of static on car radios).

When the car is switched off, the rear transponder works 100%. Strange thing is, the fronts don't give me any false warnings.

Any ideas, would be appreciatted. Do the zr4 heads overheat if used too much? Logic here is, if the rears 'jam' every time the car pulls away, would it create problems?
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  #2 (permalink)   IP: 41.122.150.126
Old 2010-04-20
Streaker Streaker is offline
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I have done a bit of testing, and what I have found is that everytime the car gets to 3k rpm the jammer goes off and will continue to go off until the revs drop below 3k for about 5 secs (assume the normal warning time for a zr4 after conflict over).

Since almost all jamming here is done from the rear, I would suggest swopping transponders, but the problem would remain as the rear would most probably scream anyway even if at the front. Like I said, old car still with points and condensor ect.

Please guys, anyone with any ideas would be appreciated as I have spent plenty $'s on engine mods and chassis mods. Maybe the 4age route with electronic ignition will cure this, but as it is the first car I have ever run a jammer on with points since the Lasertec pro 20 was brand new (a good few years), I have no idea where I stand with a points car.

The one on my E90 works great, even after been flooded over a year ago, but this new one fails. I have interchanged the parts today (rear transponder and control and display units) but still the problem persists.
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  #3 (permalink)   IP: 216.68.224.253
Old 2010-04-21
EscortRadar EscortRadar is offline
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Hello Streaker,
I am with Escort Radar, manufacturer of the ZR4. From the description you have given of the problem, "laser falsing when engine is above 3K RPM", the ignition system of the vehicle is definitely the culprit.

Falsing of the rear laser shifter with higher engine revs typically only happens in rear or mid-engine vehicles where the shifter cable is routed too close to the engine. I can't recall any rear or mid-engine Toyotas that exist which are old enough to use points so I'm a little confused why the rear is falsing and not the front modules.

What is probably happening is the rear laser cable is acting like an antenna and receiving the noise coming from the ignition system. Because it is much longer than the front module cable, it is picking up the noise much better. Using a ferrite choke on the rear laser module cable should help.

Also, you said that you interchanged the parts from another vehicle. Do you mean that you used an entirely different rear laser module and it was still falsing only when engine was above 3K RPMs? If this is true, then did you run this other rear module's cable along the same path as the original?
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  #4 (permalink)   IP: 41.122.167.193
Old 2010-04-22
Streaker Streaker is offline
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Thank you so much for the reply. Sorry for the confusion, it is front engined but rwd.

The cable routing was almost identical, just above one panel as to under it. Thank you so much for the ideas. I routed the rear cable all the way up the side of the car till under a far forward point under the dash before coming across the front too get to the module.

I will shorten the cable, route it more direct and also move the module to the rear of the centre tunnel. Will need to look into a ferrite choke though, thank you for the link.

Since you are with Escort, may I congratulate you on a fine product your company is producing. Last year febuary, my car was totally flooded and submerged so deep the water was up to the windows. Not a single inch of cable, control units or transponders was above the water. As I was at work, I only discovered the car flooded about 4-5 hours later. I went and bought a new car (e90 from above) two days later and fitted the zr4 hoping it would work. It has worked perfectly ever since.

Once only a fine, but that was due to bad positioning of the transponder. Followed what mem-tek said about the mounting (which was in your pamplet) about it been more level and proud and even against the same laser gun at the same place, I have remained ticket free.
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  #5 (permalink)   IP: 62.25.73.125
Old 2010-04-24
Streaker Streaker is offline
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Shortned the cable, rerouted and fitted a ferrite chock (took one off a old computer cable I had laying around).

Happy to report, that it has almost completly eliminated the false warnings, I only get an odd one now and again. Strange, but it seems worse when it is dark. On the way to work in daylight, only two falses and on the way home last night 5 and to work this morning (still dark) I got 4. Compared to everytime the car revs past 3000rpm. Even the 5 I can live with, but I will try to improve it.

Thank you EscortRadar for your suggestions, they were very helpful.
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