Hi guys, there was a post a while back about intermittent stalling. Since I've had this problem too, I have replaced the t-stat witha Nissan one. The problem from my friend the Master Nissan Tech said that the t-stat could have been my problem where it may have been either closing or opening too soon therefore richening the fuel mixture causing a stall. Since the t-stat replacement with a Nissan part, the idle has been steady at 900rpms and no jumping and killer heat! I also thought that the stalling problem was fixed. Here it is, the car starts right up when it's cold and when it's hot. It is ONLY when it's been sitting off for a couple of hours and I go to start it, it turns over and over for a few minutes and will eventually start. I saw on ebay a MAF sensor for $100. with a warranty, and a description of what a Max would do with a bad MAF sensor. It would cause hard starting or no start at all and poor gas mileage. The MAF sensor regulates how much air is flowing thru the engine and tells the computer how much fuel to deliver to the engine for a start. Should I replace the MAF sensor or is there any way to tell by looking at it if it's bad? Please remember that this is not a cold start problem or a hot start, it's when it's been off for a couple of hours. For example, I've had this problem when I leave the gym ( twice ). Go out to the car after being in the gym for a couple of hours and she cranks over and over for a few trys and eventually starts after a few to five minutes. Sorry for the long post, but detail is important to getting a accurate response. I've thrown a good bone here. Any help from you tech guys would be greatly appreciated. This problem must be fixed!
Thanks in advance
Jeff

 

does it start right up when you hold the gas to the floor and then try to start it

 

Hi, thanks for the reply. Yes, if I think it my try do the hard start thing, I while turning the key, put my foot on the gas and it will start right away, but I can tell by the way it started, that if I didn't hold or step on the gas while cranking over, it would just turn over and over for a few minutes like I previously mentioned.

 

too much fuel.

 

or no air getting throught the iac/aac

 

too much fuel still.

 

Regardless of what your Master Nissan Tech said, how in the world can a t-stat cause your problem. I know you probably didn't know better and with your friend being a "Master Nissan Tech" you took his word. Can someone explain to me how a t-stat can cause this probelm, better yet explain to me how a t-stat can cause "any kind" of starting problem

When the car is failing you need to check to make sure you have fuel pressure and spark. If you're mechanically incline there are steps in service manuals on how to check for fuel pressure and spark.

IMO it sounds like a fuel related problem. After the car been sitting for awile it slowly looses it's prime in the fuel line. Then when you go to start the car again, maybe the fuel pump is unable to prime the system enough to start the engine. Not to say you have a bad fuel pump, because I can show you pics of bad fuel pump harness connection that caught me off gaurd one day. My car never had any kinda fuel related issues then one day after work the car didn't start. Luckily I have a fuel pressure gauge under the hood so I knew my problem was fuel related, i.e. no fuel. So I did my thing in the parking lot and found the bad connection. Would it have eventually started if I kept cranking and cranking like what you have to do, i don't know maybe.

If you have fuel pressure and spark more than likely the injectors aren't firing, which leads to a all different area. But I say before you buy the MAF check to make sure you have fuel and spark (when the engine is failing)

MIKE

 

I changed the t-stat because my heat sucked and the temp gauge would drop on the hi-way. It was either stuck open or closed ( autozone ) The idle jumped up and down because the t-stat was closing too soon richening the fuel mixture. The starting problem I know was not related to the t-stat, it just idled alot better. I will have to check the fuel pressure and spark, which I actually do not know how to do because I'm not mechanically inclined. Info please??
Thanks alot
Jeff

 

[QUOTE=JEFF93SE]I changed the t-stat because my heat sucked and the temp gauge would drop on the hi-way. It was either stuck open or closed ( autozone ) The idle jumped up and down because the t-stat was closing too soon richening the fuel mixture. The starting problem I know was not related to the t-stat, it just idled alot better. I will have to check the fuel pressure and spark, which I actually do not know how to do because I'm not mechanically inclined. Info please??
Thanks alot
Jeff


BTW the fuel pump and all lines are all new 2 years ago replaced with Nissan parts.