ok I was driving my car around the other day and when I gave it a lot of throttle it just died on me. did not sputter like when running lean, it just flat out died and maybe sputtered once or twice and this was at like 4k rpms. when I let off the throttle it idled rought just like normal (I am running really friggen rich right now)

my car is also having that idle problem. I can not get it to run at anything lower then 1k or else it bounces around though most the time it runs at 1.5k

I have been down on power and not able to idle hardly

any ideas?

 

hmmmmmm...it could be that your ports need adjusting...

a few weeks ago i kinda had the same problem...althought it was more hesitation around 6K...but altogether it always idled perfect. anyway, i took it to JR rotary 2 weeks ago, had him clean the injectors, and put in a new O2 sensor. i also asked him to look at the ports and he said they weren't working properly so he adjusted them. now it runs PERFECT the O2 sensor gave me much better gas mileage too, if you were running rich, that might be the cause of it....good luck man

 

That sounds like the infamous 3800 rpm hesitation. It happens when the secondary injectors come on-line. This problem can be attributed to a variety of factors. A few common reasons are:

1. Bad injector somewhere. (this is what caused mine to do it) You can send your injectors to RC Engineering and have them do their injector service on them. Or the expensive option is new injectors.

2. Bad ground between boost sensor and ECU. This was a TSB released my Mazda and concerns cars 87 and older. There was a poor connection on these cars which would eventually cause the ground to fail thereby causing the hesitation. Look around on the net for the 2nd gen FAQ. Several sites have it. You will find the remedy for this problem there. It involves soldering a new ground from the boost sensor and attatching it to a bolt on the water filler neck.

3. Another possibility is a ECU that is going bad, or corroded ECU connections. Sometimes an ECU can be repaired by resoldering the connections on the ECU

Hope this helps. As far as a bad idle is concerned it could either be that you do indeed have a bad injector, or you need to adjust your TPS. Could also be a vacuum leak somewhere.

 

it's not the 3800 hes

it can happen at 2200-6000 rpms

hell it happened when going from 1500 in first just by pressing on the gas
it is not common just happens sometimes
worse when it is cold

the thing that is starting to **** me off is the idle though
it is nowere near right
if I had a vac leak it would run rich at idle anyway right?
it is running rich enough that it just about makes you pass out when idling for more then 30 seconds

how can I test for vac leak?
could it be the variable resistor?
this car never really was good at idle but b/c worse when the header was installed. lowest it goes is 1k any lower and it bounces around
though once just once I had it bouncing at 230-350 rpms

 

ok sorry I was not able to explain in detail like since my break was over

when this car is doing the thing were it dies it is just bucking and does and kind wierd and the more throttle i give it the worse it gets.
and it can happen at any RPM.
were the hesitation I was getting was just a jerk then it picked up lots of speed

also as for the idle if it was a vac leak would it not run lean?
right now it runs really rich. dont know how rich it runs when running though it seems like it runs rich there also
any way you guy know I can tell how rich it runs at higher rpms?

if it was a vac leak is there anyway to find out what line it is?
I dont hear any hissing from any were in the motor

 

Could be a failing fuel pump. My friend's 1st gen ran kind of like how you are describing when his fuel pump was bad. It would idle, but when you gave it some gas, it would eventually cut out.

 

I guess it could be the fuel pump though it was running rich through out the entire RPM range and I think it might have hit so rich that it would not ignite not sure just a though.

but damn I was taking my ex home from a friends house and my car started to do the surging and **** so I let of the gas and coasted till it started running right and I got pissed that my car was doing this and all so I ran the crap out of the bastard doing 4 wheel drifts and fishtailing in everyturn 3000-5000 rpm clutch dumps and then I pulled up to a light thinking it would be worse and I just about **** my pants. the thing ran at a perfect 850-900 rpms (need to adjust the idle speed). but it was not misfiring was not running rich. it was nice and smooth. when I was driving it was not wanting to shake like no tomorrow either. just nice and smooth and hell the idle is even better now then when I first bought the car

what gives???

 

sounds to me like you blew your engine. Pull a sparkplug and check the compression

 

hoping it is not the motor
I am going to do the ATF trick this weekend and then a compression check soon also
scared the **** of me today going to work though. heard this loud bang under my hood almost like two real quick ones and did not see anything bouncing around behind me so I hope it was not an apex. though it seems like I still have the same amount of power and also still have a perfect idle now.
also when I started the car there was a little bit of smoke though I only had the car on maybe 2 min then I shut it off. came back around 20 min later and started tha car back up and there was no smoke. though the smoke also seemed to come from the driver side tip and not the left and I could not tell what color it was. my oil level seems fine and I might put in a quart or two per 3000 miles. though my oil cooler is leaking. and my coolant lvl is just the same as it always has been.

the only real problem I have is when it is cold it likes to surge on me and the more gas I give it the worse it gets
could be this a fuel pump,filter, or something else maybe? o2.
again it only really does this when cold

 

If it idles and makes regular power, then its definitley not a motor. Have you checked to see if the cats are clogged in any way?

 

have no cats
see sig

 

just a thought, maybe your Crank angle sensor crapped out,or in the wiring? Not much to break in them but you never know, but the symptoms sound similar to what have had in the past.

 

I dont know this thing is pissing me off. I was just doing a 0-60 run and did so in about 7.5 roughly
but my car was crapping out at 6000 or so. pulled nice up to that point then **** on me. though I was able to pull a nice tire burn in second. it just wants to run and then fall flat on it's face with the 3800 hes also.

this is friggin pissing me off and boggling me
the car runs nice and has decent power right now just the surging issue.
hopefully just TB mod and being cold.
though I am going through here and after my tranny gets fixed I am replacing my wires, plugs and going with a tII fuel pump.

it I push 550 upper injectors, port my intake,remove the 6 port slvs and port my TB, plus go with a n1 dual catback with my current mods how much time could I prolly cut off my 0-60 or how much hp do you think I would make?
also would I be better off just leaving the 6 ports the way they are?