Car wont start/Gas smell under the hood

[JeremyH]

by waiting for the new frps?

could cycle the key with vacuum line disconnected and see if fuel leaks out the open end of the FRPS?

I like this idea, easy enough. Pull the vac line and just key on, thats 50-55psi f the fprs diaphragm is leaking you may see or smell fuel coming out. They can also fail without breaking the diaphragm but when they do fail that way there is usually always a code that points right to it.

 

[Aesthetics28]

I'm just pissed there's gas going into my oil -_-

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[Aesthetics28]

Changed frps still won't start without dying out

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[Aesthetics28]

Can anyone chime in?

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[JeremyH]

Have you got it to start with the maf plugged in yet with the new frps? Make sure car is up to temp first using the method i mentioned in post 15 then check codes.

 

[JUSTA3V]

What about the crank position sensor. I'm not sure if that gets bypassed when you unplug your maf. If not and the car runs while the maf is unplugged then it's not your issue.

But worth checking while you are sniper staring at your engine

 

[Aesthetics28]

So I tried to start it warm with the new frps in and a spare maf I had still nothing.. I sent a data log to lito he said everything looked normal

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[05stroker]

When you crank the motor over, does the tach move?

 

[wingntt15]

I don't know if they have TPS but I had this problem with my 91 bronco.?


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[wingntt15]

It's a throttle position sensor


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[Aesthetics28]

So when I try to crank it the tach stays at 0 until the car finally turns over

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[05stroker]

Till it turns over or starts?

 

[Aesthetics28]

sorry i ment to say starts

 

[05stroker]

IIRC it should move up while cranking as well.

 

[Aesthetics28]

so cam position sensor?

 

[702GT]

As I pointed out in my first post, you have fuel injection codes. Have you had the injectors blown out and flowed yet? Along the same line of thought, how old is your fuel filter? If debris has entered the rails, it will cause random injector issues.

It wouldn't hurt to put eyeballs on your spark plugs either, just check them out. They'll likely be fuel fouled but you could have other issues that are compounding the first issue. Perhaps even one or more that is bad enough to be a dead hole(s).

Can you describe the difference of how the car runs when the MAF is unplugged vs plugged in? Like when it's unplugged does it fire right up and idle without dying on its own vs plugged in, fires up but dies right away? With the MAF unplugged does the car smoke out the pipes and stop smoking or does it smoke forever?

My line of reasoning with focusing on the injectors is built on my own issues. My car recently started having start-up issues that it never had until recently. I had a failed start a while ago that was so bad I had to let the car sit most of the day with the plugs out, and then finally started by killing the injectors on crank up. There should have been no fuel at all in the cylinders but the fact that it cranked and puttered right up has my gut feeling an injector issue (sticking/leaking). Upon priming the fuel system, if an injector is leaking, all that prime fuel is going right into the cylinders and puddling. When the motor turns it immediately is fouling the plugs, making a cold-start even harder, and adding even more fuel. I haven't dealt with my issue because I have other things going on. But pulling the injectors and taking them to be serviced and flowed shouldn't be more than a half day project and eliminates one more component.

I also suggest, if you do pull the injectors, unplug the injectors and drain the rail into a tub/clear container of some type, just in case you can see obvious contaminates in the rail fuel.

With the codes you have, chasing sensors doesn't seem to be the way to go. All the sensors seem to be telling you it's hardware.

 

[Aesthetics28]

So this is one of my spark plugs nothing to bad...

With the maf unplugged starts up right away no issues maybe a little extra cranking but nothing that makes it weird just rough idling..

When I have it plugged it, it won't start at all afr readings go to 8 oil smells like gas and some white clouds come out when it starts for a second. Fuel filter is brand spanking new maybe 100 miles on it.

I'm thinking the Diablo mafia unit fried out. Lito informed me that if I bypass the mafia unit it would be to rich to start so it is pretty much describing my situation he's sending me a tune to check it out tn so stay tuned lol...

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[702GT]

View attachment 54519
So this is one of my spark plugs nothing to bad...

With the maf unplugged starts up right away no issues maybe a little extra cranking but nothing that makes it weird just rough idling..

When I have it plugged it, it won't start at all afr readings go to 8 oil smells like gas and some white clouds come out when it starts for a second. Fuel filter is brand spanking new maybe 100 miles on it.

I'm thinking the Diablo mafia unit fried out. Lito informed me that if I bypass the mafia unit it would be to rich to start so it is pretty much describing my situation he's sending me a tune to check it out tn so stay tuned lol...

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If you take the devil head plug off and look inside there is an LED that should flash 8 times when you turn the key on/start the car. If you turn the key on, does the LED flash roughly an 8-count?

 

[Aesthetics28]

Yes flashes quickly then 8 red lights

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[05stroker]

so cam position sensor?

If it was me I would replace the crank position sensor. They are cheap and IIRC, the tack should move while cranking the motor over. Not just after it starts.