Audiofight

Alright.

My 88 N/A starts just fine when it is cold, but as soon as the car gets to temperature, don't shut it off!

I have to floor it and crank the car kinda hard before she will fire up and go. Lots of power and idles fine, just doesn't like to start when at temperature.

I can start it cold by just hitting the key for a second and she starts right up.

Any suggestions?

BlackRx7

wierd mine doesn't start good when its cold (overnight) and I have to get on and off full throttle to keep it running.....

StarionX

Just sounds like it's flooding. Do a search. You'll find millions of posts.

Audiofight

It doesn't smell like flooding. I have flooded it before (let the plugs get up around 15k - 16k miles) and it will reek of gas, it doesn't under there now.

If it is flooding, then I am pretty much screwed for the time being (no cash for Injector rebuilds)

Suds7

Sounds like your car floods easy when warm

Audiofight

Yeah

I guess it must flood easy when warm, but somehow un-floods when it cools down.

If I don't let the car warm up (i.e. drive 2-3 blocks and kill it) I can start it back up fine every time. It is never flooded when the car is cold. Never.

J-Rat

iTrader: (2)

Thats the KICK *** HOT START PROBLEM!!! I have been spending the past few weeks trying to resolve my problem, and all indications seem to point to the injectors, or possible a bad fuel filter. There is an H-Fitting that Mazdatrizx sells that can alleviate that problem. (I would supply the link, but I dont have it handy, sorry!)

Rat

Audiofight

Well,

I do have a new fuel filter (mine is due to be changed, a little over 12 months of use) and I prolly could use an injector rebuild, but don't have the $100 roughly to do it right now.

I will post an update in a couple days after I go home and replace the fuel filter.

hugues

you probably don't have enough fuel pressure on the hot start.

the fuel pressure regulator is supposed to up the fuel pressure in hot start situation for 90 seconds, I believe.

check if there is vac at the FPR. I think there should be no vac at the FPR for 90s.

check the FSM for hot start assist system in
www.fc3s.org how-to's->manual under fuel and emissions

hugues -

NZConvertible

It's the oil. Hot oil is less viscous and can't hold compression when the engine's in a flooded state. Once the oil cools and thickens it can.

The most likely causes of the flooding are dirty injectors, low compression or both. Get the injectors cleaned as soon as you can afford it and get a compression test done in the mean time.

Audiofight

The engine only has roughly 10k miles, so compression should still be good, daily driven and oil changes done on time or before due.

The oil is the same stuff I have used all summer and everything and never had a problem. The car wouldn't start one day, pulled the plugs and they were saturated with oil and the car flooded badly.

After that, the car didn't like starting when hot. I have run FI cleaner through it and that hasn't helped at all.

I am still 1500 miles away from an oil change, so I doubt my oil is giving me any problems. I am running 10w30 in it for winter time.

I am suspecting the warm start assist not working properly, which could be the fuel filter. The only reason I would doubt it is b/c the car has lots of power all the way to redline.

NZConvertible

Sorry, I didn't mean your oil is bad, I meant all oil does that. That's why hot-starting flooding problems are much more common than cold-starting ones, because cold oil is thicker and holds compression better. That stuff is no good unless it's done regularly. It won't touch the crud that builds up over 15 years. It's definitely worth having them professionally cleaned. It's definitely worth checking that system is working properly, as per the instructions in the FSM. I doubt it's the fuel filter as the amount of fuel required for cranking is only a fraction of what it required at full load.