Ok i first noticed this problem driving on the highway i put the car in drive from over drive and had the rpms at around 3500 then when i hammered it and got to about 4000 (not sure actually where it happens) the the tach will drop to 0, but the car is still running then it will got back up and when that starts the car won't accel and just backfires. Almost seems like i get little or no spark but im not sure. Now it does it when ever i get on it but not until im doing about 40-50 other than this the car runs pretty good. leaving my house i can light up the tires. I have no clue what can be wrong.

 

bump

 

Sounds like bad spark plug wires to me. Run the engine in a very dark place and look for blue sparks jumping across the spark plug wires. HTH

 

I had that problem before and i changed the wires and they aren't that old and it is alot worse then when i had bad wires. Its weired the car runs fun its just when i floor it it gets to somewhere around 4000 or more and it just starts backfiring and the tach goes all crazy and drops and bounces back up.

 

Any one else have a clue what could be wrong. I think i here a big bang when ever it happens i really need to firgure out what is wrong.

 

Pull the cap on the distubtor and check to see if the pick up coil is corroded.

Sounds ign. related. Also put a timing light on the spark plug wires and check for an irratic flashing on the pulse. Move from wire to wire and check for each one. Do these tests and tell me what the results are and I will tell you what to do next. P.S. this test is testing more then just the wires themselves.

 

You may want to check your firing order. Just in case. How old are your spark plugs? Pull one and see if its all fouled up. And do what the other guy said figure out if something is arching somewhere. Thats almost what your problem sounds like.

 

Pulled the cap what is the pickup coil im not to good with ignition and electrical stuff. butt every thing under that cap doesn't really look corroaded to me. the cap screws seemed a lil loose not reallt loose just not tight thought after i looked udner the cap i made sure they were tight thought maybe that was the problem but it wasn't

 

Plug wires are probally a year and a half to 2 years old i think can't remember when i did them so i'll try to replace them. cap rotor coil and plugs are less than a year. Cap and rotor look fine no corrosion or arking marks. Just ordered new plug wires but i dunno i have a feeling its not the wires but i could be wrong.

 

try disconnecting the tach wire. I've had engines w/ bad tachs do REALLY weird stuff....other wise, yes, it seems to be ignition related...check what others have said and check back in...

 

oK plug wires should be here today or tomorrow since jegs is having free 1-2 day shipping. I would like to put them in once they get here but it might snow.

 

plug wires can just go bad without warning, too. when i did my rebuild, i was **** handling and storing those things, only to put them back on and have 2 of them bad, plus the coil wire... had to replace the whole set... good luck with it, hope it turns out to be that easy for ya.

 

Sounds like a pickup coil or an ignition module to me, possibly a corroded connection to your ignition coil. Does it do it reliably at about 3500 rpm? I say track it down from the plugs back, change them, change the wires, change the module, then change the pickup, finally change the coil if nothing else works. The modules on these cars do weird things when they go bad and are decently cheap, the pickup coils are really cheap and can cause you a huge headache, you have to take the distributor out to change them but it's worth it, plugs are cheap but a bear to change, and wires are decently easy to change but can get pricey, STAY AWAY FROM TAYLOR WIRES go with Accel (personal opinion from experience). Sorry that's alot of info that's not organized to well but hopefully it helps.

 

one good benny to an MSD dizzy - p/u coil can be changed without pulling the dist...

 

If thats the problem i'll just replace thw whole distributer an msd billet one is only 280 so what the hell

 

K does any one know the part number of the plug wires i need. I need them with 90 degree boots. i thought i ordered the same ones as last time but i guess i didn't, the ones i got are 31839 and the have straight boots. i ordered them from jegs but on summit it says they come with 90 degree boots. and the distributor boots don't look like the right ones either.

 

Ok never mind it was the right part number just the wrong plugs in the box

 

"one good benny to an MSD dizzy - p/u coil can be changed without pulling the dist..."

You learn something new everyday!!!

 

the brand of wires thing goes back an forth. (I hate accel, 3 bad
set brand new-1 week old...)
- anyhow got any news for us? tried something, worked/didn't...?

 

Waiting to send the plug wires back to jegs gotta wait for them to ship me something since they are paying for the return shipping then gotta wait for them to ship me the right plug wires.

 

Just got the paper to ship the plug wires back today. I have a question my battery keeps dieing just bought a new one cause i thought the old one was shot but now this on is doing it 2. Could this be related to the problem im having ?

 

Anyone have a clue as to what can be causing my battery to drain and be causing my problem. I dunno i think these 2 things might have something to do witch each other. And im still waiting on my plug wires, bought a coil to just to see if that will help at all. If i can't figure it out soon im gonna have to bring it to a mechanic which i don't really wanna do

 

have you had your alternator checked? if it's not recharging the battery, could be part of your issue. - if it's just drawing down over night, best thing i know to do is disconnect the neg bat cable, then hook a test light to the neg terminal on the batt, and put the other end on the wire. If the light is bright, somethings drawing on the battery. - the only way I know to find it is to start disconnecting things one at a time until your test light bulb gets dim.

 

alternator is fine battery only drains over night

 

K the right plug wires should be here friday. i hope they get here early so i have time to them in before it gets dark. So if all goes well i will let you guys know Friday night if the wires and a new coil help. If not on to more suggestions

 

Ok changed the wires and coil. After i charged the battery which keeps dieing i drove around for like 20 min after letting the car warm up and nothing. Then i stopped at a friends house and left the car running and when i came out it was off. started back up then when driving back to my house it died. Got a jump start then it started doing the backfiring thing again. I noticed that the positive wire going to the battery is bare in one stop and it looks corroded so im gonna replace that and see it thats the problem.

 

If you have a doide going bad in your voltage regulator it may drain your battery, also it allows A/C current to enter your charging system. your battery absorbs as a much as it can or die tryin, check with a voltmeter for a/c current (with the engine running at 2000-2500 rpm) across your battery terminals, if you have more than one tenth of an a/c volt at your battery, replace your alt, battery, and any bad cables clean all other concections, and you should have problem free charghing for a long time to come. It is very simple to check for and may or may not be the problem.

 

Ok brought the car to a mechanic he replaced the battery said it was shot wouldn't hold a charge. But when he took it for a test drive it didn't back fire. So i drove it until it started backfiring again and brought it back to him. Now hopefully he can figure out the problem and it won't cost to much.

 

Did you ever pull your plugs? Fouled plugs can cause what you are experiencing!

 

It ended up being the ignition control module