Car won't start, any suggestions?

I installed new SXFPR/ Comp FP/ 1,600's/ and fuel filter. This included rx7.com's inline resistors, which I soldered in line. I also installed the datalogit software and changed the sec. injector setting to 1,600.

My car turns over, but won't start. There is fuel at the regulator (I opened the plug and fuel started leaking) and my FP gauge shows about 30 psi.

Not sure if it is getting spark. What is the best way to check? Any other possibilities?

 

what plug did you undo and fuel start leaking out?

btw: this happened to me, what i did was to undo both leading sparkplugs and crank the engine for a while, then plug them back in and mines started right up.

check spark by undoing sparkplug and ground a wire and wrapping the other end of the wire aroudn the threads of the spark plug, then have the car in netural and have someone crank it. i was doing this just before mines started back up.

good luck

 

Sounds like you were flooded a bit.

 

Are the new injectors seated properly?

 

just sounds like a simple flooding issue. Just romve the plugs like skunks said and crack it a few times then put em back and try starting again. Or remove ems relay(I think thats the one.) and crank it a few times to burn out/push out the fuel in there. Then it should start right up after putting the relay back in.

 

Yup, your flooded. Same thing happened to me when I did this.

 

Sorry for the late response.

I opened a plug on the fpr and fuel was present. I am assuming the injectors are working, but not sure.

I can't smell fuel, even up close at the motor. Also, I can't hear the FP running at all. I jumped the FP at the diag. box and turned the car to "on".

I will check the plugs for spark (they are brand new).

 

Did you unplug the coil pack for any reason?

 

yes, but I am pretty sure all that is back intact. I pulled the lower front plug and it was dry as a bone! No gas smell. I jumped the FP/Gnd and checked the input to the FP at the tank, it was 12v+.

However, I don't hear the FP when it is jumped. I did install a new Comp FP. Are there any connections b/n the battery and FP other than at the tank? I had the whole top end off the car down to the coil pack.

I hope I just missed a plug somewhere?

 

ok, with my ear to the tank, I can hear the FP when jumped at the Diag. box.

What would prevent my injectors from working? I have fuel at the regulator and the spark plugs are dry.

I installed the AVC-R, which splices into the injector wire at the ECU. I checked the connection and it is fine. I did notice that my PFC shows 0% injector duty when I try to start the car.

Any suggestions are greatly appreciated!

 

did you set the pfc for 1600 cc injectors yet? And also check the entire harness from ecu to injectors to make sure its getting pulse before and after your splice.

 

Yes, I set the injectors to 1600 cc. I am considering undoing the splice on the injector wire and see if that works.

I really think my injectors are not firing. Does anyone know of a place inline I can meter to see if the injectors are getting the voltage they need? Preferably without pulling the UM.

 

If you are seeing fuel pressure at start conditions then your pump is working.

If you have no evidence of injectors firing then you have a problem. The secondaries don't fire at atart so look toward primaries. You should be able to use a long screwdriver to hear the injectors click. Another test to insure injector is ok is to apply voltage to injetor and listen for click. Suggest you also make sure you got the right connector on the primary injectors, and, make sure your splice on the inj harness is good as I suspect this to be the culprit.

PM me if you continue to have issues as I live in Houston and may be able to help out.

 

when you unpluged the fuel lines near the oilfilter after you jumpped the f/p and ground at the diagonstic box and turnned the car on, did fuel come shooting out? i have had instances where you can hear the fuel pump in the fuel tank but some how it fell off its pearch as well as off the hose line and the fuel pump was just shooting fuel around in the fuel tank (confused the crap out of me for weeks!). in anycase, its the line most foward near the oil filter. fuel should really come shooting out every where after you disconnect it adn jump the fuel pump

as for injector duty cycle at start up, you might be in a bit of trouble there... i did post this https://www.rx7club.com/showthread.p...=injector+duty a while back but nobody seemed to care... in anycase, the correct duty cycle you should see at start up is... "while measuring injector duty cycle for the primary fuel injectors during multiple non-starts, i saw that for 1/2-1 second when you try to start/crank the engine, the injector duty cycle for the primary fuel injectors goes up to about 20-25% and then tapers off to 0% with in 2-3 seconds if you continue to crank. idk if this helps anybody but its just something i noticed. personnaly i though that the injectors would continue to flood the engine if you did not successfully start the car but apparently it does not."

to check voltage, look in the FMS to see which connections/wires you can tap at your ecu to check for voltage. if you dont have the fms, you can dl it at iluvmyrx7.com

if memmory serves me correctly, i believe that you can check voltage by tapping into the ecu 4W, 4X, 4Y, 4Z wires

I hope this info helps. good luck

 

I went back to the ecu and rechecked my splicing for the AVC-R. All the connections were tight, but I was one wire off on the ground. How this affects the injectors I don't know, but I fixed my mistake and cranked it for grins and the injector duty went to 11.4% on the commander and BAM it started. The MF idles and revs perfect!!

I have a small oil leak at the turbo inlet (old stainless fitting) and a small exhaust leak (I will check the gasket), but otherwise it fires right up and runs well.

I am starting a new thread to thank everyone for their help. I would have never got all this done w/out the club's help.

Now to go tune next week!!