EGR stall test question

[fixkick]

I lied to you, sorry, i re- read my own page, blush.
and 1994 is the cut in date. for rear wheels must spin to do a LIVE EGR test. but i have a test for that. using any DMM or voltmeter.

also on EGR, see my page here in EGR, and the 1994 rule.below 1st link.
USA rule, USA ECU, i do not have the cut in date on the rule, what body VIN serial number cut in date or serial, only 1994 it began.
i forgot this rule and my page shows my research on that.

http://www.fixkick.com/EGR-Gen2a.html#STALL

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silly rules, how makes this up, and why must use 3 men to do this.
1: at throttle
2: one looking at EGR main
3: one spinning left rear (only) tire. off ground. (let me be more clear the rear drive shaft just spin, even by hand) car in neutral or park.

dang.
a test: not safe.
one could jack up rear, 100% on stands and put the tranny in gear forward , 1st , is safest.
and but the guy 2 is in danger, make sure the front wheels are chocked GOOD, wheel chocks,!!!
this MPH >0 rule is a royal pain in the backside,,,,, no lie.
and why? can can not Fathom it?
one reason? , make Suzuki rich selling good egr parts.?

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also on egr, see my page here in EGR, and the 1994 rule.
USA rule, USA ECU, i do not have the cut in date on the rule, what body VIN serial number cut in date or serial, only 1994 it began.
i forgot this rule and my page shows my research on that.

below 158F is a serious matter, no EFI car will run right below 180F, and 150f range the ECU drops to cold start warm up mode, all tuning is done hot, not cold or warm.
spark timing, EGR testing, and IDLE controls only work right hot. (the dash GAUGE IS NOT AN instrument its a TOY really) (EG; when in H zone engine is too hot, end of story)
http://www.harborfreight.com/infrared-th...xSEdoUTnuE
one of the most useful tools made, can find clogged rad tubes. even a single tube. easy. and no more burned hands , finds dead cylinders and many other things.

I lied about the LIVE test, it started sometime in 1994.
also on egr, see my page here in EGR, and the 1994 rule.
USA rule, USA ECU, i think my VIN numbers work but only if the engine was not swapped or the intake swapped. see below VIN.
i forgot this rule in my older posts. sorry., and my page shows my research on that.

http://www.fixkick.com/EGR-Gen2a.html#STALL

your 1994 is on the cusp, of live test A or B methods. sorry i can not tell, with no photos of engine.

here is my 1994 live test , check. for A or B type ECU.
and my gosh 2, Calif, or FED ECU? no idea.
but here goes.

the acid test. on this one silly rule.
LIVE TESTING, 1994's
key on, see 0v, at A15 below, means the ECU just closed the EGR VSV (0v is vsv closed, 12v is open valve) the valve is open , unplugged too..
0v = closed VSV and is ENERGIZED, the coil active, with 0v on this pin.

1: engine hot, i use a IR pyro gun, no burned hands. etc..... it must be hot or the ECU skips, EGR usage. its a fact. listed in the FSM.

engine in neutral or park, at all times. please. hand brake off, on later 1994+s. hand brake on, early 1994's and more early. very risky testing for sure..... be careful.
2: i race the rpm fast say 1200 rpm hot. really hot.
3: i have a voltmeter on the EGR VSV pin, here. A15 light green with white stripe wire at VSV. meter neg lead to body ground metal, engine is best)
4: i get 12vdc at a15. means the ECU is running EGR (vsv is open sucking air at mod) at 0 miles per hour. rear wheels on ground.
4a: i get 0v, means, at 1200 rpm parked, the car needs, faster than 0 MPH , or rear tires spinning, (best is keep on rear tire on ground and hand spin the tire , in park, or neutral.)
this these above fill read 0v all the time if the coil in the VSV is dead open (infinity ohms) so check that first.

see pin A15 on the 16v OBD1 schematic, this is the EGR enable pin. key on it goes to 0v (closes the valve) the valve runs backwards from thinking.

http://www.fixkick.com/ECU/92-95MPI-eng-...e-huge.png


there are 3 paths that can fail
exhaust.
vacuum (and cat back pressure gone, )
electrical (ECU and that VSV EGR)



answers
yes that video is ok, but mine drops lower. to 400 rpm. ( a real tachometer in hand)
if it don't go to like 400 rpm and shake the EGR flow is too low.

many pro's say the stall test is not definitive, this is 1/2 true, sure,. if it shakes, its good. or stalls better.
the full flow of exhaust in the EGR ports does that.
the 1994 has the Quad port egr. in the intake man.,
so if 3 of the 4 ports are clogged. i cant tell you what its going to sound like. or shake.
the quad port IS hard to diagnose. but not if those 4 intake egr injectors are clean. then all the other tests, solve all other failures.

i think your STALL test fails. sorry.
if the ISC can correct the RPM loss, the EGR flow is weak , IMO.

this is the quad port system (was day 1), it's is very hard to clean.
you don't have a 1995.5 engine. or its new manifold.
so .

does not have a mono port side wider tube.
right?
http://www.fixkick.com/sensors/EGR/97-cl...index.html

this page is my slide show for sidewinder verses quad port EGR sytems. some engine swappers get this all wrong
the side wider is single stainless steel tube. SST on the left side of the engine, introduced in 1995.5.

see this tube to the right here. you dont have that , correct.?

http://www.fixkick.com/sensors/EGR/97-cl...285%29.jpg




what is your body VIN last digits.
Rnnnnnxxx (put 3 x's at end to keep private)


all i know is this. on topic
VIN suffix codes, S = 1995 year. T - 1996,
S4102048~
S6400125~


some cars have the wrong intakes installed, i cant see car, or engine so can not know whats really there.