Phu5ion

My car hasn't been starting up right away, all the time. This problem began a few weeks ago when I was replacing the backup light switch, and the upper and lower shifter bushings.

Take yesterday for example. My car started up fine on a cold morning (25-30 F) and I drove to work (~30 miles). I start up the car after work (8 hours, cold start) with no problems and drive home again. Shortly after getting home (15 mins, hot start) I had to leave for the dentist and the car started right up and drives the mile to their office. When I leave the dentist office (45-60 min.) for home, I start having problems. The car cranks but won't start. After doing this, three times the car barely comes back to life. I drive home. Two hours later, I go out again and the car starts right up.

I don't believe that I had a problem because I drove it a short distance because last weekend I drove to a store about 15 minutes away left my car parked for about an hour and had the same cranking problem without starting.

Let me hear your thoughts, I’d really appreciate it.

~ Phu5ion

rico05

Flooded it, probally. Notice any smoke? If you got white smoke, flooded. Wire in a fuel cut switch. Do a search on the topic. I get the same problem sometimes, so I am actually on my way out the door to go install one!!

Phu5ion

You know i don't remember any smoke, but i'll look for some next time.

What could i be doing that's causing it to flood?

jimmyv13

This is the best thread for the installation of the cut switch, pics and all.

Fuel Switch

Phu5ion

cool, i did do a search and i also found this:

https://www.rx7club.com/forum/showth...ded+AND+engine

I think i'm going to try this before i add another switch.

Powridah

I can usualy cold start my TII no problem. but hot starts are stupid, I havto pump the gas a tiny lil bit to get it going and i havto crank for like 2-5 seconds usualy. I have a damaged apex seal. so if u notice a performance difference, get a compression test done. just my two cents

smith88

I had the same problem. My car was flooding quite a bit on those short drives. It was all after I started modding my car. Have you done any mods lately? Mine started when I put a new intake on.
Finally it didn't start at all. I would try a fuel cut switch.
I personally did the ATF trick on my car, and I haven't had any problems since. If I start having problems again, I'll make a switch.

blindsite

hey same problem here for awhile but added the fuel cutoff switch and havent had a problem yet so i say it works fine but do what ya want c ya later

Phu5ion

I did a compression test about 3k miles ago. i had 125-130 on the front rotor and 110-115 on the rear. That's not bad considering the engine is 175K miles young .

JohnL

Most likely the cause is a leaking injector. I recommend the fuel cut out switch as a temporary fix. Mazdas are notorious for flooding out. Also check your water thermo sensor(sensor on back of water pump). If you can make a custom code checker and see if your ecu is pulling any codes. Low compression will also cause this problem. I drove my car for a year with a fuel cut out switch before my motor finally died, now waiting for rebuilt motor.

Phu5ion

Yeah I have added a few of the standard mods like an intake and I noticed that when I was under my car the exhaust isn't the stock Mazda setup with two pre-cats. I had to get it replaced because the whole system rusted out. So now, I have a straight pipe back to the main-cat. It was kind of a nice surprise.

Phu5ion

I also had my injectors cleaned in Dec. (by a Mazda dealership ). So i would hope that that's not the problem.

But, in general the problem is pretty rare, in the two and a half weeks that it has happened i think it has not started right up about 5 times.