Well Today was a Bad day for my car. It has been running very well the past week and I thought I would take it down to the Beach since it was such a pretty day out.



So I make the 1 hour drive down to Galveston and my car is running storng. When I get their, it is crowded with people and I get stuck in Stop-n-Go traffic. Well as I was sitting in Traffic my car dies. I start it back up and it idles at under 300rpms. So I keep my foot on the as to keep it from stalling again. Everytime I came to a stop my idle wouldn't go above 300rpms.



When I get to the parking lot I park and forget about it. When I got back in my car a few hours later smae ****! PLus!!! Someone took my damn Brake Vent!!!!! https://www.nopistons.com/forums/pub...1047683358.gif Now I am pissed because my car wasn't pulling at all, and I have a hole on the side of my car. As I am driving home I try to see if my car can still go. When I acelerate it takes off slowly. Not fast at all. Even if I floor it, it still only goes as fast as if I took off slowly. When get home it is still idling rough and doens't go above 300rpms.



I have been searching all over to see what the hell it is and expectng the worse. I just got back from driving around town for abour 20 minutes and my car was flying! It was like i was in a different car. It pulled hard and idled at a strong 900rpms. Barely bounced except when I put it in gear.



So is my engine a dud and needs another freaking rebuild. What could be wrong with it. I am thinking about rebuilding it this summer to learn about the engine and just to be safe. My cousin will probably help me also. But what could be causing this??

mabye you fouled the plugs while in stop and go traffic? It can cause your car to take a **** on you. That doesent explain how it ran better later on tho, unless tehy de-fouled somehow?

Plugs are about 5 days old https://www.nopistons.com/forums/pub..._DIR#>/sad.png

map sensor line?



mike

i dunno about your performance problem (maybe she's allergic to that Gulf air,LOL).



but..somebody took your brake vent? damnnn, that sux!! chickenshit muthafuckers! sorry dude, hope it's nothing serious.

Sounds like you have a problem with heat. Seems a lot of guys have been finding lately that they have solenoids that don't work right when they get hot.



I would agree with Mike, but it is very strange that after the car cooled down it worked fine again.

check your ignition wires.... maybe it got loose in the stop and go

it most likely fell off...

if you look close at the factory clips...they only have two prongs on em

purchasing new clips now has four prongs...mazda realized the failure and corrected..

had a friend lose a vent as well.. so its altogether not impossible to lose em..

it must me that time of year. the same damn thing is happening to me. i feel for you man, i have no clue what it is either.

Well it is still acting up after I took it out today. For some reason I think it is connected to the AC but last night when I was messing with it, it didn't hurt the idle speed at all. I am looking into getting a PFC this summer and I am wondering if this will clear up any of the problems. I hope it Does https://www.nopistons.com/forums/pub..._DIR#>/dry.png

Update......Took her out again. Put it in the driveway and popped the hood. The coolant system is bubbling like crazy. It sounds like I am frying eggs on the UIM. Its gurggling and making strange noises. I thought I had a bad coolant seal but I am not loosing coolant and I haven't seen the buzzer in over a week. All my lines are connected from what I can see. She is driving okay right now. A little slower but still has power. However the idle is really really low.

what VAC are you pulling at idle, and at what RPM?

Right now it is at 13PSI and bucks a little while and a few seconds later goes to about 400rpms. When I take it out the VAC goes up and so does the idle. But I have to warm it up a little before anything happens.



I am about 5 seconds away from taking the UIM off and just checking everysingle hose. I am just so damn tired https://www.nopistons.com/forums/pub...O_DIR#>/11.gif And hungover https://www.nopistons.com/forums/pub..._DIR#>/sad.png

any smoke?

I figured that would be another indication also. I had a friend tell me he saw black smoke coming out of my muffler when I was pushing it. But I would expect that since I have no cats and a ported engine. I have noticed I am using quite a bit of fuel though in the last few days. Not by much but maybe losing 2-3mpg

maybe its something like the leading coil/ignition?



mike

yeah black smoke under accel is just fuel... normal if you are running really rich.



I'd take out your plugs, maybe one or some are fouled, when was the last time you replaced them? Especially if you are spitting black smoke, you can foul them easily. I'd check the plugs and wires... https://www.nopistons.com/forums/pub...#>/biggrin.png



edit: i see 5 days.. still, you can foul plugs in 10 min.

The plugs are only 6 days old now. The wires have been upgraded from stock ones and maybe a year old.



Edit: I'll check them out. In a little while. My car is still hot https://www.nopistons.com/forums/pub..._DIR#>/sad.png

don't rule your plugs out, then can foul easily.. my friend was replacing his plugs every time he filled up for gas...he was running really rich as well.. just check them, no sense in ruling them out if its been 6 days.

Just curious. Assuming it is a map sensor, or me running rich, Would the PowerFC be able to compensate for this stuff? I know it can fix my fuel problem but what about the map sensor?



Also when I checked my plugs when I took them out they were two different colors. Two were white and two were brown. They looked pretty bad. I think you might be right pete. https://www.nopistons.com/forums/pub..._DIR#>/sad.png I also thought for a while I was running rich.

white = lean.. probably your trailings right?

black = rich.. probably your leadings right?



only bad condition would be if they were white on 1 rotor, and black on the other.. then you have a fuel problem.



the PFC cannot compensate for a disconnected map sensor, the car would not boost and make it near impossible to drive.. you would also pour black smoke at idle because the MAP sensor would read 1bar... IE atmosphere instead of vacuum.

Damn....right on the money. I just checked them since I still have them outside. So I am guessing this is normal?

well its pretty normal. but i would replace them or clean them off, also check to make sure all your plug wires are connected properly and your grounds are good.

which 2 were normal and which 2 were not?



mike

They were just like pete said

Trailing-white

leading-black



When I first put the new plugs in the car was strong. Now it is so-so.

This summer I plan on getting the PowerFC and an ignition pack to hopefully help out.

both sets are pretty normal. In most cases you don't want the trailings to be pure white, but a little bit of white on them is normal as the trailings get the "end" of the combustion cycle and the leadings get the first "half" as to why they are black from burning lots of fuel. Joe, i would get that PFC as soon as you can and get a good map for the mods you have.



As the white is normal on trailings, you kinda want them brown with some tips of white. Just go easy on her, and change the plugs.. lemme know what happens.

i just removed mine today, and both sets were black....????? i am completely stock so just the FD just normally run rich?

I think that is just normal. I have learned that these cars are just like people. Everyone is different.



I plan on getting the PFC either next month or the month after. I don't drive it much, Just to school and back and since their is no school now I only drive it to entertain myself. Thanks everyone for their input!

yes a stock fd will be all black, they do run that rich



joe: have a look at the leading ignition, the coils do go bad



mike

yeah you can check the resistance on the coils easily, by pulling the plug wires off and using an ohm meter.. you can find the specs in the 93 manual.

Yeah, I will look into that.



I drove my car around a few hours ago and it is mad fast yo.

so its running fine now? what did you replace? fix?

I didn't fix anything. I just checked a few hoses. unplugged them, plugged them back in. Checked my plugs, Put them back in.



Started my car. No Rough idle. And the car is driving faster then ever. I had a dentist appointment and the lady freaked that I was able to get their in 10 minutes https://www.nopistons.com/forums/pub...1047683473.gif The place is a good 5 miles with alot of traffic https://www.nopistons.com/forums/pub...DIR#>/ohmy.png Drove to Home Depot same power. Drove home.....same power. But I have a feeling tomorrow when I wake up. Back the land of 300rpms https://www.nopistons.com/forums/pub...O_DIR#>/11.gif

well good luck with it.. sounds like if its doing it like that, that a solenoid or actuator is sticking or getting hot... https://www.nopistons.com/forums/pub..._DIR#>/sad.png

Which means what?? How can I fix it? Can I fix it?

well, everything can be fixed.... just matter of finding what needs fixing. You are still sequential right? Could be any number of things.. just keep driving it and see what happens for now.

I had the very same problem earlier in the year. Symptoms sounded exactly the same. Had it fully serviced and tuned but no one could find the fault. New plugs and leads didn't fix problem either.

Eventually fault was found. There was a split in the air intake line from the air filter. Check all the piping.

Very simple fault but a real pain in the ass to find. Took me 3 or 4 weeks to figure it out.



If thats not it, sorry I couldn't help ya. Hope you sort it out soon.

I think that could very well be another factor. The intake on my car is in bad condition. I am saving for some hardpipes. The previous owner diconected the BOVs and now their are hoses that are exposed. I need to cap those mofos https://www.nopistons.com/forums/pub..._DIR#>/sad.png