i have a 88 s4 na. i recently was out driving around, nothing really out of the ordinary, came home shut the car off, went to leave about a hour and a half later and the car would not start? it would just turn over and over without wanting to fire up? the weird thing was the next day i went out to try to find the problem, went to start it, just to see if the car would start, and it started right up! i really want to try to figure this out? any ideas wold be appreciated thanks

 

Typical hot start issues. Read this thread to find out why it happens: https://www.rx7club.com/showthread.p...ight=hot+start. Unless your injectors are leaking, fixing it is not simple at all. The start map has to be leaned out, which means Rtek 2.x or a standalone. A fuel cut switch or switch on water temp sensor's wire can be a bandaid fix.

 

well i dont know if its a hot start issue or not, i know that it will not start now at all? it just turns over and over with a different sound than usual.

 

It's probably flooded then. Search for de-flood procedure.

 

well if its getting flooded all the sudden, why would it start fine some days, and not at all on others? i put jumper cables on it today, and it just sat there and turned over in a different sounding way then usual? l am really stumped because i was just driving the car the other day and now it seems like its dead in the water? thanks for your help so far, please keep it coming thanks

 

and another thing, when i turn my key forward as if i am going to start it, there is just a beebing

 

Sounds like what would happen if the battery were low. With key to "on" do the wipers or turn signals work?

 

yeah with the key turned forward everything works fine, im kinda thinking rotary rocket might be right about flooding cause i charged the battery up good last night, and it turned over fine. and when i looked under the hood at things, i could smell gas? i need to figure things out and get it running all the help is much appreciated thanks again

 

The car is flooding.
If the car will not start after you shut down,,then you wait,Say a Day,By the time the gas has had time to Evaporate in the housing.So it will star up like nothing happened.
If you can smell gas you should find out where it s coming from(look at the pulsation dampener as it is prone to leaking)
If the fumes are just because the car is Flooded then you are OK,to an extent.
But the car should get the injectors cleaned as a maintenance routine,.(the injectors on the Rx7 are also prone to getting dirty and sticking..leaking,etc).

 

My car does that exact thing because it needs a rebuild. Turns out my water jackets went bad allowing coolant to enter the rotor housings. Therefore drenching my spark plugs with coolant. Are your radiator hoses rock hard after you drive the car?

 

i know the engine needs rebuilt, its at its end, pretty high milage actually, but i did put some injector cleaner in the car prior to it not wanting to start at all. so i dont know if the injector cleaner had anything to do with it not wanting to start now. but i can deffinetly smell gas after cranking it for awhile just like its not gettin its fuel. and my radiator hoses stay pretty sturdy even after running they dont get rock hard or anything like that, though the the hoses could probably could use a changing. any help on gettin this car to start will be much appreciated, and thanks for all the help so far

 

i might add that the car has not been able to start for about 3 weeks or so its just sittin. and when trying to start just keeps turning over and over, and after a while i can start smelling gas. thanks

 

You should try new spark plugs maybe yours are fouled. My car had terrible gas mileage and had trouble starting at times when i first got it. After i put new Spark plugs all the problems seemed to disappear. You should also do a compression check.

 

i just replaced the spark plugs about 480 miles ago but i need to check them. ha its been miserbly cold here where i live, it has not been above 10 degrees in the past month and a half, so im limited to what i can do and check on the car. It really sucks. any further comments are much appreciated thanks alot! and also further detail on how i can go about checking and possibly replacing injectors would be really nice thanks again

 

It's flooding. What year is the car? I believe some S4's and all S5's have an injector cranking cut feature where if you go to 100% throttle during cranking the ECU will not fire the injectors. This will allow you to clear out the housings of fuel.

 

its a 1988, i have been looking around and researching a little bit and have found a couple procedures for flooding. what i read was to remove the EGI Fuse and crank the engine in 5-10 second increments 3 or 4 times. This should clear out my fuel. Replace fuse and start. i really need to try this out but its been hard to find time... its really sucks, thanks for all the info please keep it coming

 

good news, finally got the car to fire up. i used the deflooding procdure above and it took about 3 times but finally it worked out. one thing i might want to add is the s5 has the one EGI fuse and the s4 has two, EGI comp and EGI inj, i read all over the place and finally figured out i needed to remove both of mine as to the s5 you only need to remove its one. if any one knows why this flooding occours and if i can expect it to happen again please comment back thanks alot

 

anything....

 

leaky injectors, low compresion and bad spark are the main reasons for flooding

 

And turning the car off before it has warmed up and a faulty Water Thermosensor are also contributors as well.

 

just wondering, why would turning the car off before it has warmed up cause flooding? and whats a water thermosensor? just questions i would like to have answered. and yeah i really need a compression check any advice on how

 

The Water Thermosensor measures the temp of the coolant and provides this info to the ECU as an input and then the ECU takes this input info along with other input info to discern how much fuel the engine needs given the situation. So this sensor is used during start up and the amount of fuel injected into the engine will be dependent on the coolant temp as the colder the coolant the more fuel is injected and the warmer the coolant the less fuel is injected. Now a faulty Water Thermosensor reading will tell the ECU to inject an improper amount of fuel at both start up and driving. An improper reading at the ECU is likely caused by the wiring or a poor plug connection at the Thermosensor.

As far as why the engine can flood when the car is turned off before fully warmed up I cannot remember the exact reasoning but if I come across it I will post the info. When my car was a couple of years old it would flood if I started the car just to move it in the driveway which would take all of 15 seconds to do and when I tried to start the car a week or so later it was as flooded as could be. This occured the second and third year I owned the car and the car was purchased brand new so it doesn't require low compression or leaky injectors or a faulty reading at the ECU via the Thermosensor or any sensor for that matter.

 

You're right Satch. I Had this flooding problem twice with my 88 NA in the 7 years i owned it. Due to my own fault because not warming it up before shutting down, but i was ignorent and knew nothing about rotaries at that time. After that i never used it for very short distances and never had the flooding problem again. The engine had 90.000 miles without rebuild.
Building a switch to cut off the fuelpump may also do the trick.

I've even heard that the newer RX-8 has the same problems?

 

this info explains alot. it is really cold up here where i live, and i must admit i have fired my car up and shut it off much before it had reached operating temp a few times... but i was unaware of the problem that can occure. im going to closely monitor the temp of the car before shutting it off in the future but i really do need to perform a compression check if anyone knows of a effective way to do this i would appreciate the info thanks again everyone!

 

Hi we're having the same problem and can't find a solution please help also where would we find the thermosensor ?