i got a s5 na...And this morning it decided it wasn't going to start for me. I know rx-7's are a bizatch in the cold, and i dealt with that last winter. so here are the symptoms....Car turns over...and over...and over.....once ina while it will act like its going to start up, once in a while will get up to about 700 rpm and then die back down. I do smell gas. I thought hey maybe its that common problem of flooding, so pull the green main fuse right???well that didnt work either...Im prettty much out of ideas, and if you have any please post so i can start lookin at it. this is my dd so without it runnin, im out a car. Im not sure if its a spark or fuel issue. I bought new spark plugs so those ought to be good and wires are in good condition. is there an easy way to test a fuel pump? i know theres that listen for a whirl sound when someone else turns the ignition to on position but ive never heard anything. thanks for the help!

 

The car should run fine in the winter. Mazda is not in the habit of building cars that don't work in cold weather.

When is the last time the car had a full tuneup?

Have the injectors ever been professionally cleaned?

If the ECT is reading wrong, then the ECU may be hammering fuel into the engine. Test it as per FSM instructions.

 

try puttin starter fluid in it when its cold and it should start right up, when it is cold here it will never start in the cold. but i also have every emissions removed. all i do is put some starter fluid in and BAM..! starts right up. hope that helps

 

ive sued starter fluid in the past, thts the stuff you spray in the intake or something like that right? would that be a possible way to ignite the fuel already in the motor? its the weirdest thing, cuz yesterday i didnt drive the car anywhere all i did was move it from one parking spot at my apartment to teh other. started up fine. Full tune up= not as long as i have had it however had a rebuild 2 years ago. i dont know the history of injectors either, that could be a good idea. thanks for the replies aarona nd tandolla.

hah just noticed ur in everett, ya so you know how the cold works lol, but then again i think aaron has it worse lol

 

sence you just moved it and shut it off, you flooded it, have you done the deflooding process? ( i dont remeber if you said you did or not )

 

yup pulled i think its called the egi fuse and flushed it until it started drownin out, popped the bad boy back in and no go. i have some starter fluid at my parents im gonna grab tommaro. if i remember right you spray it in the intake tube right? i think that might work, if it wont light up after doin that then maybe im not gettin fuel from my tank...hmmm....if there is fuel sitten in the motor then it should light it up and get her goin. This is the first time this happened on this car, my old 87 flooded once in a while and that fuse trick worked every time

 

mo flooded s4!

 

Take the plugs out..Clean them..roll the engine over,With the EGI Fuse removed...30 seconds.Put the Plugs back in,put the Fuse back in.,.START THE CAR.

 

Not to hijack the threat but what is the ECT? I think this is exactly what is happening to mine.

 

Pull each leading plug and put about an ounce of oil into each chamber. The oil will absorb the fuel and recreate the oil film on the housings necessary for compression.

That could be a large part of the problem.

Engine Coolant Temp.

 

thanks aaron for the post i will try that tommaro, im gonna pull the plugs and look at them/test plugs. I tried starter fluid today and even with that it would not start, so i think i got some kind of spark issue.

 

well i tried this today, when i pulled the plugs out they were a little wet, i cleaned them up the best i could, went outside had my brother watch for fuel coming out when turnin the motor over, without the fuse in, turned the car over for a while, lettin the gas come out which it did. plugs back in, wires back on, fuse back in. tried to start it and same thing....The weird thing about it is that the day it decided not to start it kept getting close to firing up, it would get almost to 800 rpm before dieng back down to turning over and over, now it doesnt even get to that point. The battery is pretty much all used up so im going to have to put it on the charger over night. but am looking for more ideas. Im still set on that its a spark issue, i looked over my wires real good no corrosion and in good shape..so i think that leaves me with my coil packs. Do i need to check each spark plug wire to check for spark from the coil? in the lame haynes manual i have it says if Leads coil is bad you replace both and if trailing is bad you can replace single. Since i really only need to worry about the leads firing, or getting spark should i focus on that coil pack or are both really important....And one last maybe dumb question- are s5 na and s4 TII coil packs different, or interchangable ( i have some lying around) again thanks for the help, i hope this thread helps someone else someday lol.

 

low compression and severely flooded IMO ...
had EXACT same symtoms on a 86 a while back. Keep trying unflooding procedure (though being an S5 other ways to stop fuel, egi fuse pull is easy --pull egi fuse crank try to start repeat) catch it on one of the near starts and feather gas to keep going. If the same as mine, an IMMENSE cloud of smoke will follow as it reseals and clears oil and gas from chambers.
of course do ther checks but if you havent done anything else weird to car besides movin it then no reason other then low compression flooding.
(well lots of other things haha but...)

 

Push start it

If there's compression, spark, and fuel, it'll start

but do put some trans fluid or 20w50 in the plug holes first

 

hmmm aaron i was reading another post that popped up in the 2nd gen section on flooding and what people did that worked. you said to put a ounce of oil in motor before starting to re film the walls. how does this work besides re-sealing the walls with oil and helping compression? i just thought it interesting and after forgottens post, i hadn't tried that yet. Im sure its not low compression, my motor is healthy as can be minus this lol.

 

Stop cleaning the plugs. Once they've been contaminated with fuel, they need to be replaced.

A battery that is "used up" will only make the situation worse. You need a fresh battery with a full charge.

Putting a few ounces of oil into the chambers sucks up the fuel and rebuilds compression by forming a film over the sealing surfaces. When you flood an engine, fuel washes this film away.

 

If you have a squirt can (cost maybe a whole whopping three bucks)and put some twenty/thirty weight oil in the can, you could just pull the hose off where the AWS hose connects to the dynamic chamber, and squirt a few ounces of oil in the dynamic chamber.

Put the hose back on and try starting the engine. The oil you squirted will go into the chambers and relubricate the seals for better compression. Sure beats pullng plugs out and hand turning the engine and squirting oil in the rotor chambers. Beats it by a country mile at least.

Have spark??? Pull a lead wire off a plug and hold it in your hand and touch the engine with your other hand. Have someone start the engine and see if you have a tingle off the sparkplug wire. NO tingle. Then get some spark before you wear that starter and apex seals out.

 

ahh i see. guess ill get some new plugs then + oil trick next. My battery isnt used up, its a gel battery just needs to be recharged. Hailer that is awesome lol i never heard of that one before. thanks for your help guys if it doesnt work then i will get back to ya

 

ok tommaro i am workin on the car, bought new plugs just in case, after testing the old ones. got some oil to put in before turnin over (one once) i am wondering though, s4TII and s5 na coil packs are they different or same?

 

I believe the coil packs are the same between S4 and S5. Check the Mazda part numbers to be sure (parts catalogue in FAQ).

 

ok as stated before i am working on the car today, this is what i have done so far in my troubleshooting.
Checked plugs for spark, EVERY plug and all give off good spark. pulled the lead plugs out and turned the car over to get the gas out, and let it un flood as we continued to turn over to check Trail plugs for spark. all of the plugs are in good condition, wires ect. So i was dumbfounded after doing this because i was sure it was spark, i know i have fuel. I checked the resistence of the crank angle sensor to make sure it was good, resistance was within spec. I cant think of a reason now why moving my car from one parking spot to another would have any effect on anything else. Oh and aaron while the plugs were out i put about one once of oil in each lead hole. i comp tested just for the eff of it, both housings were measuring 75-80 psi. this i found weird because if a seal went out it would effect one not both, and this motor was rebuilt less than 3 years ago, and has not been ridden hard, and i do not see why moving from one parkin spot to the other would mess that up. thanks for your help aaron.

 

Hope its not a repost....

is there any possible chance that your MAF/AFM plug is a wee bit loose? If it possibly backed its self off the tiniest bit... ( which ive heard S5's do ) then the car wont start ( act similar to flooding )

Just a wimpy shot in the pitch black dark..... but hey!

 

Change the plugs. Same thing happened to me (and for the guys screaming low compression mine checked out good) Sunday the plugs where wet and black when I pulled them, outside the motor they fired good, inside undoubtably they aren't firing under compression cause when I changed them it fired right up and other than smoking (gas in the cats) it ran good. it won't hurt to check the compression as well though.

 

guess thats the cheapest thing to do right now. you had spark outside of the car? hmm thats interesting maybe cuz when cleaned up out of the car they werent being re-flooded with gas upon startup.

 

ok new update.....Had time to work on the car today...so i went and bought NEW spark plugs, even though i was sure i had spark anyways. turned the car over with leads out to get rid of any fuel in motor. turn for 10 secs wait 30 did that 7 times. pulled the trail plugs they were wet. I had the egi fuse out while doing this. threw new plugs in, hooked up wires, left egi plug out turned over on the FIRST rotation i got a little "rump" just one, then it flatlined on me with just steady turning...turned over 3 times for 10 seconds then had someone pop the egi fuse back in, still no reaction and it just turned over...
AFter this i called boostlee who has been very helpfull, he told me to unplug the yellow plug under the dash just on the right of the steering column, this goes to the fuel pump. so unplug it and turn it over and after a while plug it back in and see if i got a reaction...still no reaction....Im getting effing irritated, im driving around a el camino right now that this week alone i have dumped 100 bucks into just for gas, if i dont get this fixed soon there isnt going to be any money left to do so....