1987mazdarx7

ok well i think i tried just about everything and i still cant get my 86 fc to fire up. i tried my compression. its about 90 psi. tried to deflood the engine. didnt do a thing. tryed to see if plugs are sparking. they are. wires are good to. check the fuel filter. not clogged. new fuel pump in and working to. i was goin to try to check the timiming but i'm not sure on how to adjust it etc. any other ideas. also on my fues panal next to the strut tower, there is a egi fuse then another one then there is suposed to be a 80a main fuse which is not there. this could be my problem i think to but i can not find one anywhere. i went to canadian tire, napa, fergisons, r&a. any other places or even if this is segnificant? again the car is roling over but wont fire.


thanks
brett

Dr4900n

Canadian Tire has the right fuses (for 5 bucks a pop >_< ).

Why did you goto these places? Sparkplugs?

1987mazdarx7

no looking for the fuse. they do not have an 80A fuse like i need. they have 60A and 100A. same with all the rest of the places

Icemark

Again as posted in your last two threads, the fuse box layout is found in the FAQ for FC:
S5 underhood (S4 simular- except the 100 amp fuse is listed as a 80 Amp fuse):


In car:


Note: the engine fuse on the inside of the car.

Now, why you are even looking at fuses is beyond me.... lets look logically.

If you have fuel getting to the spark plugs (they are getting wet) then chances are the EGI fuse is good.
If you have spark, then chances are the EGI fuse is good.
If you have fuel and the fuel pump jumper is not in place then the AFM, ECU, fuel pump, fuel pump relay are all good.

So that should rule out the fuse nonsense.

Are the spark plugs getting wet for fuel??? What is the condition of the battery and the condition of the spark plugs??? new ??? off some other car??? etc. If the battery is good, what is the voltage when the key is on, and what is the voltage durning cranking?

1987mazdarx7

the spark plugs look really good. they were in there when i got the car. the battery... well i dont really have one thats not dead. i have been using booster cables from my alero while my car is running and hooking them straight to the cables on teh rx7. is this bad? the voltage was at 14v then it went to about 5 while cranking. any ideas? and as far as the fuse goes. that 80A fuse that i was talking about thats shown in the pic. yeah its not bad. its not there. lol. there is no fuse there. the plugs are getting wet with fuel. also my fuses panel cover is different and has different fuses on it. it gose. 30A egi comp. 40A egi injec. blank. 80A main,which isnt there. then not sure but yeah. any ideas on what to try next.

rotatech

block ur fuel line the one that comes from the tank strted then check it out low compression

1987mazdarx7

i acctually did the deflooding procedure and shut my fuel pump off when i did it once and did a compression test and it didnt change it was still 85 to 90 psi

Icemark

anything under 8 volts and the car won't start. The ECU needs at least 8 volts for the power supply in it too work.

1987mazdarx7

it might be 8 or 9 volts not sure but it deffinetly goes down and quick. what could be wrong and how do i fix it?

Icemark

First thing would be getting a new and correct sized battery

1987mazdarx7

well the battery i had was working but it went dead. its basicly running off another batery but its attached to another car.but its running through the jumper cables.

Icemark

and is the battery in the other car a Group 35??? No, you said it was for an Alero??? Like that is even barely big enough to run an Alero... how the heck is that going to start an High compression rotary engine???

I don't get this... you know you need a battery anyway, and a poor battery will not start the car (and leads to flooding- which is your other problem) and you keep posting "why doesn't my car start"???

Instead of buying the part you know is bad, you spend money on fuel pumps and who knows what else??? (and did you get a performance fuel pump???? if you did that will make the flooding and not starting issue even worse).

I just don't get it.

1987mazdarx7

ok well i have a battery for it but its dead. i need a group 35 you said. my battery i have for it is a groupe 35 but its dead i need to charge it but i dont have a charger. my friend does i just havnt had a chance to make it over there to charge it.

Icemark

if it is dead it needs to be replaced... not charged. A battery drained down to the point that it is that dead, is gone. It is wasted. Even if you charge it again, it will only be at 50% capacity unless it is a deep cycle battery. And every time you drain it again cut that 50% in half....

1987mazdarx7

well i need a battery that i can keep turning this car over with untill it starts. if i'm goin to buy a new battery and then kill it by turning it over then whats the point?

Icemark

if you can't push start the car, and you don't have a battery that will retain over 10 volts, you will never start the car

1987mazdarx7

it reads about 14 volts but when cranking it goes down to like 5 or 8 r 9 or somthing. i wil check again later after school.

cmanns

I ran off of my chargers engine start mode, let it sit for 10-15 mins and it will be about 14v when cranking it will go to bout 11. When my batt is dead I've had the car turn over with less then 8v as its crankin it would keep dropping then turn over...

1987mazdarx7

so i should be fine with the way i am doing it now?

1987mazdarx7

if so whats wrong, i cant find anything. i dont know why it wont start and neither can anyone thats looked at it.

Icemark

again, that will not start the car. I am gonna stop even posting for you (besides that you started how many threads on this), if you can;t do the basics.

DO YOU UNDERSTAND that the starter will crank over with as little as 6 volts, but the coils and engine computer need at least 9 or 10 volts for a marginal spark and 12+ volts for a normal start??? If it is flooded (which I suspect), then you want 14.4 volts to clear the flood.

Stop posting until you are willing to do something about fixing the car.

1987mazdarx7

i am very much so willing about do somthing about fixing the car. i dont have alot of money to play with. i pmd you saying to delete my other threads. i'm sorry about this but i posted befor saying that i dont know a whole lot and to be paciante (spelling) with me. you seem to be the only one that feels this way. i dont see anything wrong with what i'm doing. i'm just trying to learn and gain som progress here. hopfully make my first rx7 work. sorry if i did something wrong but i just want some help.

1987mazdarx7

a teacher at my school also said that it might be my timing. we couldnt figure out how to adjust my timing etc.

1987mazdarx7

any one know. i heard its somthing to do with the thing next to the altenat0or but i cant find anything about it on any site

1987mazdarx7

ok well i got my 86 fc to finally run. the car would idle for about 5 mins and shut off. it did this a few times and when you reved it, it would go to0 like 2000rms and go back down and then shut off. any ideas? the car has been sitting for a while also. not sure how long but it was last inspected in 2000