first, tell history ,(maintenance, and is fuel fresh and when is last time it ran right? and when was last time a tank of fuel ran through it)
second < any tune ups done to it in 60k? miles. rotor,cap,wires,plugs,filters?
rough and surging.
rough is not good, treat that separate. (a/c raises idle , no surprise there but tells me ISC is alive)
when rough is the rpm below 800, yes, then rough is normal.
if rpm drops below 800 the motor or EFI is sick.
ECU is programmed to hold idle at 800. (a/c off)
surging can be :
tuneup badly needed.
TPS bad or not calibrated so that the idle switch is closed at idle ,or someone tried to set TPS, by ear (near,impossible)
or motor is running lean. (look at spark plugs, white or black with carbon and wet?
or motor is running rich fouling the plugs.
cheers.
__________________ http://www.kick-fix.com/
IS YOUR CHECK ENGINE LAMP ON ? running.
96 Tracker, 5sp, 2Dr,4w,d OE stock.Fed48+No A/C ,No Cruise. +MPG gauge , live dash fuel pressure , oil pressure and voltage gauges. + fur lined gimbals beer holder with IV drip mod.
works fine at higher speed but when stopped idle is rough and surging. when a/c is on smooths out.
173,000 miles on engine. Check engine light on constantly for over 4 years. Checked at auto zone it's the smog contrrol valve... very expensive +$250 so I ignored it.
I'm an amature so my terms may be a bit off ... in the last six months had real loss of power issues on hills, rough idle, etc. My non Suziki mechanic changed plugs, rotor, t-belt kit & tensioner, pulley, fuel filter... shortly thereafter, cam shaft pulley sheared off, oil pump was damaged too so it was replaced... pulley (i think that's what it was) was epoxied back on cam shaft and it runs a lot better but rough idle when stopped pursists.
This weekend I changed the plugs again, rotor, and all the spark plug wires. There were major improvements but still somewhat rough idle. It is interesting that idle smooths out when A/C & fan are on.
Per "Whitfield" on PO400 Exhaust Gas Recirculation (EGR) Low Flow & "kytrackerguy" I'm checking out now the EGR hose for blockage.
running with CEL on , is not good. if flashing , you are melting the CAT.
400 is bad egr.
1: clean hole #1
2: do stall test. if fail Clean SST pipe as i show, ,still fail clean all passages until stall test passes.
3:if you get this far, post.
i think you mean the crank cog keyway sheared. (not cam) if this happened valves hit piston, and good bye motor.
and the oil pump casing was damaged by the bad key and cog wobbling,wrecking the seal in the pump.
you can get good used EGR valves. no need to spend $250
just because ECU says egr is failing does not mean the most expensive part is bad,
in fact it usually is not.
just dirty.
just like not selling car when ash trays are full, eheheheheheh
running with CEL on , is not good. if flashing , you are melting the CAT.
400 is bad egr.
1: clean hole #1
2: do stall test. if fail Clean SST pipe as i show, ,still fail clean all passages until stall test passes.
3:if you get this far, post.
i think you mean the crank cog keyway sheared. (not cam) if this happened valves hit piston, and good bye motor.
and the oil pump casing was damaged by the bad key and cog wobbling,wrecking the seal in the pump.
make sure you mechanic , reads the TSB and torques the lower crank bolt to 94 lbs/ft.
all books are wrong, only the TSB is valid. !!!
metal tubes held by brakets # 27 & 28, fed be hoses 39 &41 as well as 42 & 44 were clear used computer air cleaner to blow air through and it came through forcefully.
metal tubes held by brakets # 27 & 28, fed be hoses 39 &41 as well as 42 & 44 were clear used computer air cleaner to blow air through and it came through forcefully.
I'll check EGR Main @ #1 if I can get to it.
Forgot to mention... CAT was removed as first option to deal with lack of hourspower on hills and idle surges... didn't help much.
NOTE: We're in a rural area with no smog regs. Is there a way to buypass all this EGR stuff?
oops, none OEM spec car. you fooled us.
no there isnt.
ecu is tuned to use it. all the maps for aFR and timing are tuned with EGR flowing.
so you EGR MOD is dead.
cant offer any suggestions.
my 96 ran like crap with stuck closed EGR VSV. effective killing the EGR.
Prev owner drove with lumpy motor (wierd bogging and lean spots) for years .
soon as i saw the light I knew it was just egr plugged.
cost me $15 to fix it.
no reason to remove a cat if it isnt melted and causing stopped up exhaust.
in fact motor runs real good with it.
in the 80s EGRS REALLY SUCKED. but today ,they help.
keeps valves cooler ,
and all these benifits. It is fully integrated today.
oops, none OEM spec car. you fooled us.
no there isnt.
ecu is tuned to use it. all the maps for aFR and timing are tuned with EGR flowing.
so you EGR MOD is dead.
cant offer any suggestions.
my 96 ran like crap with stuck closed EGR VSV. effective killing the EGR.
Prev owner drove with lumpy motor (wierd bogging and lean spots) for years .
soon as i saw the light I knew it was just egr plugged.
cost me $15 to fix it.
no reason to remove a cat if it isnt melted and causing stopped up exhaust.
in fact motor runs real good with it.
in the 80s EGRS REALLY SUCKED. but today ,they help.
keeps valves cooler ,
and all these benifits. It is fully integrated today.
oops, none OEM spec car. you fooled us. missing smog component
no, there is not a a way to fool ecu into liking missing cat converter.
no clear cut easy way.
except: putting in a exh . header restriction plate that makes the EGR-MOD valve happy. [ pioneer , you are here ]
or reprogramming the ECU. (dont know how to do that? on any SUZ! )
ecu is tuned to use it. all the maps for "AIR FUEL RATIOS" and timing are tuned with EGR flowing. the ECU has Tables hard-coded for a stock car,
if you deviate from stock , the ECU can mess up horribly.
so you EGR MOD is dead. .. this sensors measure exhaust back pressure.
and adjusts EGR flow proportional to this flow (load).
when you remove the cat the back pressure goes to zero and the EGR mod valve becomes Inoperative or errors.
OEM , Origional Equipment Manufacture also called OE, FOR original equipment ., this means AS SUZUKI made it , as it left the factory.
or as GEO/GM/SUZUKI made it at CAMI.
Should i just replace EGR VsV, EGR MOD, EGR MAIN and put CAT back on??
Thanks for all your help.
if you can get it to work with out a CAT-Converter, please tell us.
we'd love to know how.
I have a great write up on EGR ops by toyota that has an identical system.
all this is explained i vivid detail.
PS:
your car may have 2 problems, not rare for this.
__________________ http://www.kick-fix.com/
IS YOUR CHECK ENGINE LAMP ON ? running.
96 Tracker, 5sp, 2Dr,4w,d OE stock.Fed48+No A/C ,No Cruise. +MPG gauge , live dash fuel pressure , oil pressure and voltage gauges. + fur lined gimbals beer holder with IV drip mod.
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Rough Idle
Linear Mode
