ok ive searched all through the forums and i havent found anything to help me with my problem.

i have an 87 rx7 stock everything nothing has been changed its n/a.

my problem is it wont idle, it will start and jump to 3grand and then die, i figured it

was the MAF sensor but i have went through 3 junkyard sensors and 2 rebuilt

sensors from the parts store and it still wont work it has no vaccum leaks bc it use to

idle no problem, ive done the test where u start it with it plugged up and then start it

without it plugged and it will idle for a min unplugged but still dies and when u try

to plug it up while its idling for that min it kills it instantly i dont what to do im

stumped and i need the car running asap any help and advice will be appreciated

 

Are you sure there aren't any vacuum leaks?

So does the car start, go to 3K, then die every time? Can you ever keep it running?

If you can't keep it running, check all the pins in the AFM connector. If the AFM is not properly connected the fuel pump won't run.

Just as a test, jump the yellow test connector located at the passenger shock tower (sometimes under the airbox). Start the car. Does it now run?

 

yea it dies everytime i try to keep it running by playing with the throttle but it doesnt help

anymore it use to stay running if i stayed on the throttle but now nothing and what does

jumping that wire do?

 

That wire is the test connector. It causes the fuel pump to run anytime the key is set to IGN.

 

which part of the connecter is the ground and which goes to power? its the one on the shock

tower that takes 2 male connecters right? its the only yellow one i have found i dont wanna

do somthing wrong and mess my fuel pump up

 

You don't connect the two sides of the connector to ground/+12v. You just stick a piece of wire in the plug to connect the two sides together. And yes, it's the yellow plug.

If it stays running after you do this, the problem lies with the AFM or AFM connector.

 

alright i hooked the jumper wire up and the car ran with the MAF sensor unhooked no

problem, so i hooked it up and it killed it with the jumper wire connected, so i unhooked the

MAF and it ran and then i unhooked the jumper wire and it died so is it the MAF sensor?

 

AFM or the AFM connector. The pins in the plug could be corroded or broken, or you could have some wires damaged going into the plug.

You can also test the AFM's fuel cut switch directly. Measure resistance between terminals E1 and Fc. It should be infinity with the door closed, and 0 with the door open the slightest bit.

 

ok thanks ill test it and let you know what happens thanks again

 

with my rx7 it will wont idle untill the hot and cold gage starts to move and acually warm up..i have to sit in my car hold the manual choke un freezing cold for about 10 mins just for it to idle and i can hear it not want to idle and it will go from under 1k up to 2 and just keep going up and down till it warms up. idk if its similir to yours but it idled then i drove it and parked it pulled it out 2 days later and no idle till it starts to warm

 

Please post in your own topic. Because you mentioned a choke, it sounds as if you have a 1st gen. This is a 2nd gen topic and talks about the EFI system, which your car doesn't have.

 

alright so i tested a MAF sensor and it was OL with door closed and 0.3 with it fully open, so is

that acceptable or does it have to b 0 with door fully open?

 

Not sure if you still need any info or tips. But when I was rebuilding my motor, It did the same thing when I had gotten it back together. Turns out it was just a bad ground underneath the intake manifold. What it did was go to about 4k rpm then dies even when I had my foot floored on the gas. Just my own passed experiance, thought i'd pass it along.

 

This is on the resistance/ohms scale, right? 0.3 ohms is next to nothing. It doesn't have to be exactly 0.

I would suspect the AFM plug since the AFM fuel cut switch apparently checks out. Check the pins, and look for brittle/broken wires.