Some Bucking at Low-end...then pulls like a mule, Trying to get all the bugs out--I need your help |
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Some Bucking at Low-end...then pulls like a mule, Trying to get all the bugs out--I need your help |
computers4kids |
Apr 14 2007, 09:32 PM
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#1
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Love these little cars! Group: Members Posts: 2,443 Joined: 11-June 05 From: Port Townsend, WA Member No.: 4,253 Region Association: None |
I need your help...I've got my transplanted djet 2ltr (76 de-smogged motor) in and running...and driving. I'm trying to get the motor running good but I'm having a problem with low rpms.
If I try to slowly accelerate the motor seems to "buck," hestitate until the motor reaches about 3,000 rpm then it's smooth sailing. However, if I put my foot into the pedal harder and run through the gears it pulls hard and strong like a mule....awesome. Below are some things I've done:
The only other symptom worth mentioning, is when I first start the motor when it is cold, the idle hunts quite a bit....like 1000 rpm...not to sure what that is all about. I did install a oem thermostat and the air flaps are working correctly. After it warms up the idle is fairly steady but a bit rough. Sorry for the long story....I need some ideas |
brp914 |
Apr 15 2007, 10:50 AM
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#2
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Unregistered |
do you have your original temp sensor? measure its resistance (while cold) and compare with the new one. there is apparently more than 1 part # with different specs. when I replaced mine the resistance of the new was alot less and this caused bucking on accel especially when cold. I compensated with a 500 ohm resistor, but this is not really the proper solution if the right part can still be obtained.
worn trigger pts wont cause rich running. the two times I've had them go (after 310k miles) it would go from good running to 2 cyl to 'walk home' in short order. No amt of fiddling will bring them back. If you're going to keep the car and keep djet, you need a spare set. Even at 175. think how much you're saving in insurance, gas, and registration. another source of bucking is if your throttle switch is dead. you can check this by turning ign on (don't start engine). open the throttle valve on the engine and listen for the clicking sound of the injectors. this only takes a moment - dont leave your ign on or you can fry your pertronix. good luck |
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