Montanrchy

so i just picked up an 86 n/a for $250, body is in pretty rough shape but its fixable, my main question though, it is not getting spark(or so prev. owner said i havnt had the time to check it yet) form him unplugging the MAF to put on an aftermartket intake. he told me it wouldnt start after that, so i guess what im asking is what should i check for and run through to figure out how to get my new love running?

Evil Aviator

The MAF sensor array on the 84-92 RX-7s is called an Air Flow Meter (AFM). I wouldn't put much faith in the previous owner's diagnostic skills if he can't even install an intake without killing the car.

I would first check to make sure the AFM has its electrical plug attached properly. You can find a link to a free downloadable Factory Service Manual (FSM) from a link in the FAQ for FC. The 88 manual will work for your 86:
https://www.rx7club.com/2nd-generati...faq-fc-494667/

If it was attached properly but the car still wouldn't start, then I would next try this unflood procedure:
1. Make sure the battery is fully charged.
2. Open the hood and remove the fuse block cover shown below. You will find it near the driver's side shock tower.
3. Remove the EGI INJ fuse, which is usually green. I recommend holding the cover and fuse in your hand so you don't lose them.
4. Get in the car and crank the engine for about 5-10 seconds.
5. Replace the fuse and cover.
6. Now see if the engine starts.
7. If it doesn't start, then remove the spark plugs and see if they need to be cleaned or replaced. Try the procedure again with clean spark plugs.


If that still doesn't work then I would check to make sure the fuel system is working. The ignition system is the last thing I would check because it rarely fails, especially when installing an intake. Our cars suffer much more from engine flooding and poor electrical connections to the fuel pump.

Montanrchy

fuel pump works, but just fugiured out its not getting spark??

Montanrchy

i dont have a multimeter but i have one of the buzzy testers and checked the black/yellows wires on both coils and they are getting power

Evil Aviator

Did you perform the unflood procedure listed above with clean spark plugs?

Montanrchy

also when i checked the fuel pump i couldnt here it in the car but when i pulled it out and tested it it whirred kinda quiet but but it still was pumping, but then this brings me back to the AFM question how would i go about checking to make sure it is letting the fuel pump turn on?

Montanrchy

yes i did and the spark plugs are pretty much brand new

Montanrchy

and with the coils, on both of them, there is one single wire with a connector on it that i cant fond another wire that goes to it, is this wire for diagnostics??

Montanrchy

and my air/smog pump doesnt have a belt going to it could this also be the reason for the car not starting? it turns over but just doesnt sound like it is even trying, and kinda seems like the starter is spinning the motor to slow but then again im used to hondas so i dont know for sure.

satch

iTrader: (1)

There's a Black wire that has no end for connecting to a tach for diagnostic purposes. There is a Black/White wire in a Green check connector near the leading coil. Wire must have voltage w/key to on as it powers the ECU. No power on this wire usually means the EGI COMP fuse needs replacing.

And you need the belt on the air pump since it also powers other items although it's not the cause for not starting.

Montanrchy

is this wire in a connector that doesnt plug into anything if so i checked it and it is getting power. would anyone be willing to pm me their cell phone number so i can send pics and get info faster?

Montanrchy

or can someone post up pics that i car refer to and see if certain connectors need to be plugged into any ect.?

apsolus

iTrader: (2)

when i first got mine it was a hard start, i used transmission fluid poured into the spark plug hole, then it started

Montanrchy

ill try, but this still doesnt solve my no spark issue lol, ima give a it a whirl and ill post back with results

satch

iTrader: (1)

You don't need pics to check the Black/White wire for voltage w/key to on. Plug has four wires where three are Yellow based. Other wire is B/W.

satch

iTrader: (1)

Please do not pour anything into the plug holes until you figure out why there is no spark. Use some common sense!

Montanrchy

ok, should this connector be plugged into anything?

satch

iTrader: (1)

The Green check connector, no.

Montanrchy

the plug im holding the right one?

Montanrchy

the blue/yellow wire is by the trailing coil pack(closest to rear of car) is it for diagnostics also?

satch

iTrader: (1)

Should be the one especially if the four wire colors I stated that are in the plug match up w/the ones in the pic you provided.

satch

iTrader: (1)

Yes if it ends in a bullet connector.

Montanrchy

this look right?

Montanrchy

blue/yellow wire as stated above

Montanrchy

could it potentially be my plug wires? and how would you recomend testing spark with with coil packs?