Thread: Pcm

**97gtp01gt99gt** · 12-27-2019

Ok bought zzp 1.0 pcm 11/30 just received the other day installed car wouldn't start did the case learn even thou sent in original pcm checked cables twice battery ground was a lil loose tightened and jump car started went to get gas n smokes battery died after refueling got a jump car started right up drove around for a while went to a friends and dropped off gxp radio left car running to charge the battery shut off for ready to leave a hr later car wouldn't start with a jump next day go get a used battery jump the car starts right up went home parked the car shut it off and tried to start no start checked the vacuum lines and the plugs all ok changed ignition module no start just keeps cranking this is after a l67 swap reason for buying the pcm car drove ok before tune but was told I needed to tune to get the car to run right car drove gud from what I noticed but just keeps dying after turn off n wont start back up at a lose any help greatly appreciated car is a 99 gt turned gtp next is gtx just need one more door badge

**GTPpower** · 12-27-2019

Holy hell man, use some damn punctuation.

I would get your battery load tested to start.

**97gtp01gt99gt** · 12-28-2019

My bad was 420 somewhere treat this like a txt

**bandook** · 12-28-2019

Lol wow! Man, that took some serious effort to read that. Triple check all connections. I'm guessing you disconnected the battery when you installed the PCM? Is the battery a side terminal? It was loose? Did you strip out the threads, maybe?

**97gtp01gt99gt** · 12-29-2019

I got the car to start after autozone charged the batteries I took up there installed a spare I had got charged with new side post terminals second try the car cranked up I drove attend for a few minutes and went back home and parked it tried restarting no luck battery started to die after repeatedly trying to crank the car switched to the junkyard battery car kept cranking hard until the battery started to die put jumper cables on car no luck still

**Scottydoggs** · 12-29-2019

you have a large power draw going on.

you need to get a volt meter, or DDM on the battery, note the volts and then start pulling fuses one by one looking for the volts to come back up.

**97gtp01gt99gt** · 12-29-2019

I was using a scan gauge imma disconnect this second amp because radio went into protection mode since u said something about large power draw

**Scottydoggs** · 12-29-2019

if it was installed same time as the new pcm. it might be the issue.

**97gtp01gt99gt** · 12-29-2019

Naw after bandook said pcm needed to b tuned for the swap I sent the pcm off and started to install a 4channel 6x9 amp but when I installed the pcm and got the car started I put the radio face on and it went into protection so I looked at the amp and saw the 6x9 amp was in protection mode bought of offer up 1600 watt 40 bucks maybe to good to be true but I was using the trunk latch as a ground probab6not the best spot or the amps no gud but will disconnect and see what that does

**97gtp01gt99gt** · 12-29-2019

On scan guage battery is 12.6 then 14.5 when running after turned off car wont restart will install fuel pump n get battery charger to keep battery charging while trying to case learn

**Scottydoggs** · 12-29-2019

you thinking security learn, thats not the issue here, unless the security light is on or flashing.

**97gtp01gt99gt** · 12-30-2019

No security light did the LEDs on the dash cluster no light bulb for security spot the put the low coolant light bulb in there fue to flashing no security light on swapped the bulb around nothing I don't believe I need to do the security or case learn due to it being my original pcm

**97gtp01gt99gt** · 12-30-2019

Can get the car started by spraying starter fluid in it

**97gtp01gt99gt** · 12-30-2019

99 grand prix cranks no starts runs with starter fluid - YouTube

**GTPpower** · 12-31-2019

Did you check fuel pressure?

**97gtp01gt99gt** · 12-31-2019

Yes I did and I was told it was weak so I changed the fuel pump with a new I had still same issue but the pressure out the shreader valve is way stronger on the depressurize

**GTPpower** · 12-31-2019

You need to check it and see what it is now.

**CHI2000GTP** · 12-31-2019

That valve barely squirted out any fuel, in my opinion. Should be shooting strong like Ron Jeremy.

But for real. Something fuel related is going. She cranks solid from what I hear in that video. Re-check fuel pump. You should be able to clearly hear the fuel pump tuning on/priming. Should be very very easy to hear. I once did a hot-wire on GTP fuel pump and mismatched the wires and it would not start.

Is there fuel in the car? That's another question (been there myself).... There's also the fuel filter. Hows that looking? Last time it was replaced. Might by gunk lodged in the filter and just moving around causing it to flow/not flow. Any leaks in the fuel lines? They are usually rusted out by now in these cars.

Go to AutoZone, rent the fuel pressure tester. It is free to rent. And test pressure and valve. Seems weak to me.

**97gtp01gt99gt** · 12-31-2019

I changed the pump with a new one I bought last year and never used the tank was full shouldn't have filled up before doing the pump but it primes gud and rans better but still needed to spray starter fluid in it but I will put my fuel gauge on and check

**bandook** · 12-31-2019

So it starts, runs and drives when you start it with starter fluid? Then you run it, engine warms up, shut it off and it won't immediately restart?

You are using l67 injectors for sure? I mean, it sounds like you have good spark, fuel and power. My guess is something in tune (which should be fine) wrong injectors or most likely a loose connection somewhere. Are you running the injector harness adapters from zzp? I had issues with them when I first did my swap. Soldered them straight to the engine harness and all was well.

Thread: Pcm

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