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Old July 21st, 2009, 08:16 PM   #1
Dirty Ridin 1
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1991 Tracker 1.6

Looking for help quick details.

Motor will run perfect all day parked. you can rev it up and runs great.

Put it in gear and step on the gas and it will run up on rpms then act like a back fire enough to jolt the hole vehicle. get going into a higher gear start to accelerate, just into a fresh shift it will fall on it's nose again. at 55mph it will drive along and then jolt the vheicle, with a loss of power then regain power and keep going does this about every 500 feet.

I would like to start by checking the coil for resistance but can't find info on how to do so any help? any suggestions?
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Old July 21st, 2009, 11:00 PM   #2
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what codes is it throwing?
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Old July 21st, 2009, 11:02 PM   #3
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my sammi was acting kinda like that with a vaccuum line off
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Old July 22nd, 2009, 07:56 PM   #4
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We have not been able to get codes, after replacing the burned out dash light, it only flashes on when the misfire occurs. The light does not stay on all the time.

Also my father checked the resistence of the primary and got 1.1 cold hanyes calles for 1.35-1.65, the secondary was perfect. we have not been able to test under warm or running tempature yet.

I checked the cat by taping with hammer to see if there sounded like any loose rattling nothing.

We also checked all vac lines to assure tight and did the best to inspect them for damages.
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Old July 22nd, 2009, 08:03 PM   #5
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also forgot after testing the secondary coil dad found a rougher connection on the secondary, after cleaning the connection, the miss (hickup) is now happing even while in park reving the motor up.

Could the primary coil not be providing enough and starving the spark?
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Old August 19th, 2009, 10:23 PM   #6
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Well I'm not the quickest to respond...a month later, and I'm no pro at the Zuk stuff yet...

...This sounds exactly like an upstream o2 sensor. I've blown my front o2 on my Cherokee twice offroading and had similar effects...stutter as if its going to stall then will grab RPM's like a bat out of hell, popping noises from the exhaust, loss of power and speed at 70ish. Moisture gets in the sensor and blows it. Easy and so far only fix I've found: Replace o2 sensor.

Hope this helps if your still trying to figure out the cause.
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Old August 20th, 2009, 09:35 PM   #7
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A bad O2 sensor will generally just make the 1.6 run rich as hell and stink horribly.
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Old August 20th, 2009, 09:37 PM   #8
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if you have a scanner, hook it up while it is running and get the code when it is running and backfires
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Old August 20th, 2009, 10:21 PM   #9
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Quote:
Originally Posted by hondadirtracer View Post
if you have a scanner, hook it up while it is running and get the code when it is running and backfires
You do realize you check the codes by jumping 2 wires together and counting the flashes right?
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Old August 20th, 2009, 10:29 PM   #10
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You do realize you check the codes by jumping 2 wires together and counting the flashes right?
no, I did not. thank you for that info.
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Old August 20th, 2009, 10:46 PM   #11
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Could be a short in a wire on the engine. When you give it gas and the motor rotates slightly the wire could lose the connection and when you let off it reconnects?

I had that problem once after I swapped a motor in a saturn.
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