New and problems with keeping it running

[cesar280z]

HELLO,

I JUST GOT THE Z A WEEK AGO , CHECKING EVERYTHING THE PROBLEM THE GUY THAT SOLD IT TO ME HAPPENED, WHEN THE CAR START GETTING WARM, IT START I DONT KNOW, MISSFIRING, NO POWER AT ALL, 1ST, CLUTCH, 2ND, NOTHING CLUTCH, 3RD NITHING, 4TH NOTING, I HAD TO STOP THE CAR LET IT COOL FOR A LITTLE, AND THE IT STARTS LIKE NOTHING, THEN A COUPLE OF MINUTES AFTER, EVERY THING START AGAIN, .. ALSO THE IDLE RPM ARE REALLY HIGH, 1500RPM, I TRYED TO LOWER IT TO STANDARD ABOUT 800PRM, HOWEVER, WHE THE ENGINE START, AND THE MISSFIRING HAPPEND THE ENGINE AT THAT LOW RPM SHUTOFF., AND THEN ALL OVER AGAIN,. ALSO I CHECKED THE MAF UNIT, I TOY WITH THE TROTLE AND TRY TO PEEK IN THE MAF UNIT , AND I SEE SOME ACTION I DONT UNDERSTAND,. THE FEELING I GET WHEN I'M DRIVING IND THE "MISSFIRE" HAPPEND IS AS YOU PUTTING YOUR HAND TO COVER THE MAF , JUST LIKE THAT WITH A EXHAUST ACTIVITY.

HOPE THIS GIVE A CLEAR SPECIFICATION OF MY PROBLEM, HOPE YOU GUYS CAN HELP ME..THANKS

1976 280Z 4SPEED

NO MODIFICATION

1976 280z

1990 300zx

2004 350z FairLady z (I'll get it back!!):pirate:

[EScanlon]

Cesar:

QUIT SHOUTING!

Also, you might use paragraphs and sentences, it makes it a whole lot easier to try to understand what you're saying. Few folks will even attempt to read it once they see what you've posted above, and that means no answers for you.

E

[cesar280z]

Hello

Sorry if I was a little excited with the first thread, I was in the rush and i wanted to put the thread as soon as i could, I didn't mean to shout or something like that.

basically I do not know the problem , the sypmtoms are as follow:

1 - At warm temperature the car starts to act, missfiring,

2 - the car doesn't stops when missfairing, because the idle has been raised to 1500rpm,

3 - When car cool down everything goes back to normal

hope this info helps and hope somebody could help me with this issue.

thanks , again

1976 280Z 4SPEED

NO MODIFICATION

1976 280z

1990 300zx

2004 350z FairLady z (I'll get it back!!)

[SteveJ]

Hello

Sorry if I was a little excited with the first thread, I was in the rush and i wanted to put the thread as soon as i could, I didn't mean to shout or something like that.

basically I do not know the problem , the sypmtoms are as follow:

1 - At warm temperature the car starts to act, missfiring,

2 - the car doesn't stops when missfairing, because the idle has been raised to 1500rpm,

3 - When car cool down everything goes back to normal

Since the problem is happening after it heats up and goes away when it cools down, the chances are that it's electrical.

Take one of those cans of compressed gas. You know what I'm talking about. The ones you use to blow off dust from electronics, etc. When your car is warm and misfiring, hold the can upside down so the liquid comes out, and spray it on your ECU to cool it down. See if your misfire goes away. If not, try doing it to your coil & ignition modules. Also inspect connections to the igntion module and ECU for corrosion. Clean them and protect them with dielectric grease.

[FastWoman]

How warm does the engine have to get before it starts acting up? About how long does it take?

[5thhorsemann]

Capitalization and punctuation.

Question; What are you doing?

Answer 1; Helping my Uncle Jack, off his horse.

Answer 2; helping my uncle jack off his horse.

Yes, its that important when trying to discribe the issue with your car.

[cesar280z]

How warm does the engine have to get before it starts acting up? About how long does it take?

About 180, or 25-30 minutes of street driving.

[cesar280z]

Since the problem is happening after it heats up and goes away when it cools down, the chances are that it's electrical.

Take one of those cans of compressed gas. You know what I'm talking about. The ones you use to blow off dust from electronics, etc. When your car is warm and misfiring, hold the can upside down so the liquid comes out, and spray it on your ECU to cool it down. See if your misfire goes away. If not, try doing it to your coil & ignition modules. Also inspect connections to the igntion module and ECU for corrosion. Clean them and protect them with dielectric grease.

Thanks I'll try it

[FastWoman]

About 180, or 25-30 minutes of street driving.

Your capitalization and punctuation were very good; however, I cannot give you full credit for your response, because it is an incomplete sentence.

5th, I think that would be "... uncle, Jack, off his horse." (You omitted a comma.)

Grammar aside, your engine has to get pretty warm to start messing up. I was thinking it might be a fuel/air ratio issue, but now considering how warm you have to get it, it does sound more like a heat-related component failure such as Steve is suggesting. I'd probably look at the ignition module, coil, and ECU, as he suggests.

[5thhorsemann]

My uncles names are Neal & Bob.

[cesar280z]

Your capitalization and punctuation were very good; however, I cannot give you full credit for your response, because it is an incomplete sentence.

5th, I think that would be "... uncle, Jack, off his horse." (You omitted a comma.)

Grammar aside, your engine has to get pretty warm to start messing up. I was thinking it might be a fuel/air ratio issue, but now considering how warm you have to get it, it does sound more like a heat-related component failure such as Steve is suggesting. I'd probably look at the ignition module, coil, and ECU, as he suggests.

Seems that I have to be more careful about my Grammar:)

Grammar aside, today I drove my Z for almost 35 minutes with no problem.

I will try Steve suggestion:)

Thanks for good sense of Humor FastWoman!:classic:

[FastWoman]

Cesar, pay attention to the weather and the heat inside your car. Remember that both your ECU and your ignition module are INSIDE the cabin of the car, just inside the kick panels. So if your car has been baking in the sun, both of these components will be starting out a bit on the hot side when you start your car. If the weather is a bit more fair, and if your car has been sitting in the shade, your IM and ECU will be less heat-stressed. I don't know whether that would coincide with when your engine messes up, but it's something to watch.

These intermittent problems are the worst! I hope whatever the problem is, that it just FAILS for you, so that you can track it down.