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Mazda 2.0L \  "The Turd" has me constipated..

"The Turd" has me constipated..

Mazda 2.0L Mazda Engine Mazda Tech
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replies 3
following 3
 
gusto   +1y
I bought "The Turd" a few weeks ago, it's an 86 b2000 se5 stock 2.0, the idle was set pretty high when I bought it, but it runs like a top, I've driven it daily without any setbacks, starts every time and doesnt seem to run hot or burn/leak any oil.
The previous owner had the following maintenance done prior to selling it, new plugs, wires, distributor, belts, radiator, inline fuel filter, oil and oil filter.
I've been getting a little bothered by having to shut it off when at the drive thru bank, resturant etc. because of the high revving engine noise.
I set the idle back today to what seemed like normal operating rpm's, about half the prior speed.
The motor during accelration worked smooth through the gears, but during braking it almost stalls(vacum?) unless I feed it a bit of pedal, at stoplights it bumped and chugged a little and I could hear some exhaust pops, when I shut it off it puked a few times making me think it was timing.
I swiped the timing light this evening and pulled out my chiltons for the b2000, the timing was a bit off, not too much, I noticed a few bolts stuffed in vacum lines and assumed they were deleting emission BS but I tried running them where they belonged, no change.
My next target is fuel delivery....I want to get it running proper before I proceed with the cosmetics.
Any ideas or experience would be greatly appreciated.
Thanks in advance.
gusto   +1y
Delete...
Dont know how I got a duplicate?
reid13   +1y
the choke may be stuck that will make it idle high
hocbj23   +1y
If it is the stock Maz carb,poor idle is a symptom of several things.Timing is one--6% BTDC is spec.Secondly,the factory carb is a mess at best and the PO may have screwed around with it trying to get the truck to run right.There is an EGR valve on the passenger side of the carb that gets fouled with carbon.U can take it apart and clean it out to see if that improves things. Also,try taking the lid off the carb and spraying carb cleaner into the carb with a buddy holding the gas pedal down to about 2500 rpm.If the stock exhaust is in place, there is a primary catalyst right below the exhaust manifold that often gets clogged.No way to clean that I know of.U can just jerk it off and replace with a straight pipe and lose the pollution devices if u dont have inspection where u live.bj
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