Recent content by torfinn

It used to cycle about every 5 times I press the brakes. Now it cycle every time, and even when the car is idling in park. I think it should hold pressure for a long time. When it doesnt should I look for leaks? There arent any dealers where I live. (it is a 2,5 hour drive). Torfinn

I have the crappy bendix abs system on my 89. The pump and master cylinder was replaced under warranty 4 years ago. Now it has started to cycle the pump very often. I just need to touch the pedal and it comes on for a few seconds. When I started it this morning it ran may be 30 seconds even...

Octane rating has nothing to do with burn speed. It notes the fuels ability to self detonate with compression and temperature. Higher octane means less self detonation. High compression engines must have high octane. Torfinn

I just changed my rear spring with new quadratec springs. What a difference. It increased height with more than two inches. The old spring looked like this: It is a wonder the bushing didnt come loose. I could pry it loose with a screwdriver Torfinn

My factory manual says to stay under 2000 for best mileage. Torfinn

31 inch tires equals 787 cm. Multiply with pi (3.14) gives the length round the tire = 2,47m. 100km/h = 1,6km/minute=1600m/min 1600/2,47 = 647rpm on the wheels. multiply with the axle ratio 3.53x647 = 2283 rpm on the propeller shaft. To find the engine rpm multiply with actual gear ratio: When...

I think that pulse width wouldnt vary between injectors in one cycle. Why should it. Each cylinder should have the same fuel amount. It wouldnt make sense that an individual cylinder should have a richer fuel mixture than others. So it would be adequate to measure one cylinder and multiply with...

An even more elegant solution without a microcontroller, would be to use an eprom. I am not sure how much an eprom can be loaded. If it can drive a LED directly? If not an eprom and an oktal driver is all that is needed. Then one can also get the letter P for park. How to measure fuel...

I did not think of the 74ls155 and 74ls147. I am not familiar with all the circuits in this family (74xx). I am just a hobby electronics engineer. Although I have a master degree in electrical engineering (power electrics). I have studied the two circuits you mentioned, and I think it will...

It consist of the following parts: 7447 7-segment driver 74LS83 binary adder 74LS04 Inverter 74LS86 XOR gate 7805 voltage regulator It was not very hard to do but I had to think of it a while, and did some testing in my workshop at first. THe hardest part probably was to hold the stripboard in...

I have just build and fitted a home made gear indicator for the AW4 transmission, into my 89 XJ. I used two 7-segment displays. One shows the gear position 1-4 and the other shows an L to indicate Lockup. I used 4 TTL circuits 3 optocoupler, 2 7-segment displays and a few other components. I...

I have some voltage fluctuations that acts like this: When driving in the dark and switching from hi to lo beam or low to hi the voltage starts to vary from 14 to 13 approximately and the lights varies accordingly. It varies with a frequency of 3-4 per second. And it lasts for a few seconds then...

He was asking about the rear wheel bearings. The complete hubs are for the front wheels. Torfinn

82 Ex military Mercedes G-wagen.

Older cherokees and may be newer also, must be crancked two full revolutions before it starts firing. Therefore it is a slower starter than most other engines. regards Torfinn