boredomkills

my car sat for about a month a half without dfriving but i made sure to start it atleast once a week and rev it a lil bit for a few minutes i never really got on it hard and until now i didnt notice this but when i put hthe gas all the way to the floor it sputers for a second then revs up like normal but if i put it in drive with my foot on the brake like i am trying to do a burnout sometimes it will die sumtimes sputters then all of a sudden revs up.

boredomkills

i was thinking maybe the tps sensor or sparkplugs it has new sparkplug wires and they are in the correct order

dimented24x7

iTrader: (2)

Possible weak ignition or fuel issue. Check the ign. module as well. Its driven at full dwell when the throttle is opening up. It could be getting weak. Does the tach fluctuate when this happens?

boredomkills

yes the tach does do this
what would that mean?

boredomkills

i worded that bad i meant to say what would that mean as in what is causing my problem

dimented24x7

iTrader: (2)

That indicates a faltering ignition, possibly a bad module not consistantly firing the coil.

v8nate92RS

My car does this too, especially when going WOT above 3000rpm. My AC Declo plugs, MSD wires, cap, rotor, and coil are all good. I think it might be my module, where is that located again?

dimented24x7

iTrader: (2)

Under the cap of the dist. easy to replace.

v8nate92RS

Oh ok, so you're talking about the black piece that the plugs into coil. I thought you were talking about the Electronic Spark Control on the firewall...maybe I should replace both and see what happens.

xlwhellraiser

iTrader: (1)

I had the same problem, and this happened after I switched to MSD coil and a new cap and rotor. Bumping up the timing helped a tiny bit.
This happens to a lot of people who get the MSD coil, which is interesting.
I'll get a stock replacement one in a week, and I'll let you know what happens.

I hapened to also replace all the pluggs, wires, distributor TPS, IAC,TPS re-build the TBI and it did not help. It might be fuel related, but I doubt it.


Laters.

90RS305

Doing a full tune up once in a while is ALWAYS a good idea. Replace the cap/rotor/ICM (if necessary) plugs/plug wires/fuel filter, basically all the stuff that is designed to eventually wear out. I've got a 7.4L 454 TBI thats in Major need of a tune up (and if it doesn't work, look for a new thread coming soon ) but yeah, always a good idea. As far as the Ignition Control Modual, it is RIGHT under the distributor cap. Matter of fact, the cap sits on it. It's about 2-3" long, about a 1/2 inch thick. Matter of fact, looks like this:

xlwhellraiser

iTrader: (1)

Take it to advance auto parts and they can test it for you.

I had very similar symptoms and I tested the thing, and it tested OK. Thats when you're gonna start hitting yourself over the head.
How's your fuel preassure???

Did you get a new coil, or new dist. cap lately???

boredomkills

i havent got a new cap or rortor lately
i took the spark plug wire off of the number one cylinder and it seems to be getting a good sized spark but it isnt really the color i m used to seeing it is more of a red then the blue that my dads truck has when i did the same thing so that would mean a weaker spark so the icm or coil?

dimented24x7

iTrader: (2)

Test it using a spark plug. Ground the plug to the head and observe the spark. Should be a strong blue/white spark thats audable.

boredomkills

i m going to go test the spark the way i was just told in a little bit once hte battery charges but i couldnt even get it started this morning after a few minutes it did then dieed if i would hit hte gas hard i had to baby it into the garage and it kept dying so now my battery is dead is from that

90RS305

Hey really quick man, not trying to be mean, but some punctuaion/grammer will get you a long ways here on TGO

boredomkills

Well, today i changed the icm and it was like magic it runs so much better. Thank all you for helping me figure out what to change, becuase i hate just changing parts and then it turns out that they were the wrong one.

boredomkills

My car is doing it again. IS there a problem elsewhere that is casuieing the icm to go out? What should i do now?

boredomkills

It is very bad now it ran fine two days ago. To make my day even worse after i came home from school sick i need to pull my car intot he garage and i am going down the street only going about 20 or so and my hood flys up so now i need a new hood too.

xlwhellraiser

iTrader: (1)

Check your negative cable on the block??
Check your positive cable too!
Than check to see if you have any shorts.
I belive that a loose negative cable on the block can mess up few things including the ECM. HOwever, it might just be getting a false reading from somewhere!!!
Gotta start troubleshooting.

Its kinda hard on the TBI cuz everything that I replaced and checked seemed not to fix anything. WHich was bull if you ask me.


I would bet on a loose ground!!!!
Check them all.


Oh, and check your battery too. Open and see how much water there is. If its low (which I am betting it is) just fill it up with boiled/distilled water!

boredomkills

My car stalled out this summer for know aparent reason this sumemr when my friend and i were with some girls, but anways it would not restart then when i messed with the main leads going to the battery it started, but i could never find out which wire was bad so i willl look more tonight. AS always thanks for the help.

boredomkills

I took the icm to advance it wasn't that. I have checked all the grounds and the positive cable also. MY cap and rotor are still ac delco parts and so is the coil. It has a new fuel filter and the fuel pressure is twelve psi. Should i be lloking the coil and cap and rotor i was thinking prbably the coil since it ran better when i cahenged the icm but it is doing th same thing now.

boredomkills

Also, i ran it in the garage when the air filter off and it seems to have a perfect spray pattern from the injectors.

86z/92rs

Hello to all from Bahrain!
boredomkills, have you tried replacing your fuel filter? Can't hurt to check since that's one of the things I do when doing a tune up on my vehicles.

boredomkills

it was changed about 2000 miles ago

boredomkills

i changed the coil. no luck still doesnt run right

boredomkills

Just like when it started running bad it came really fast from just runnign bad to the next time i tried to start it it wouldnt start i have good spark and its getting fuel. I do not know if the pressure is right but the spray pattern is great and it looks to be floowing the same amount of fuel as usual when i take the air filter off and look at it. COuld my timing be off for some reason? Or is the icm bad? Or something i am missing?

Tarnel

Ok just so you know, I really have no idea what might be going wrong. BUT, I have an idea that you might want to check.

Check the battery. Make sure its giving around 12 volts. Also check the alternator and see if its working right. Good way to check the alt is to take off the positive battery cable while the car is running. If it stays running then your alt is giving enough juice. If not then the alt is bad.

I dunno if this will work but you said your car sat for a while and a weak battery might be your problem. Plus if anything just replace it for 40 bucks at Wal-Mart.

Like I said I don't know if this could be the problem or if it could even be related but it wouldn't hurt to check.

-Tarnel

boredomkills

I woke up today checked all the wires and stuff and let the battery charge all night and it runs great.

Tarnel

Wait so that worked? Omg I was just taking a guess. Hah!

Well cool, and hope something else doesn't come up =P.

-Tarnel