Car starts but won't stay on

[95chickn]

Just redid this motor and everything hooked back up. Now the car starts but if I try to rev engine it cuts off. It wont stay on long enough to get a code. Idk what it could be. Might have to buy sensor by sensor. IAC? FRPS? EGR? Vacuum leak? Etc. I soooooo ready to drive this car again its been over a year its been down:help:

[Shaijack]

Not to be a smarty but does it have gas?

[TORINO]

The fuel pump will run while cranking and after that I think that it reads oil pressure to stay on ??

[Turbov6Bryan]

Is the maf pointed the correct way?

[RF Overlord]

IAC? If it was the IAC the car wouldn't idle.

So you're saying the engine will start and idle fine, but as soon as you touch the gas pedal, it dies?

[95chickn]

If it was the IAC the car wouldn't idle.

So you're saying the engine will start and idle fine, but as soon as you touch the gas pedal, it dies?

It idles for 4 seconds then starts falling...i try to rev it up it trys to pick up 1,500 rpm then just choke on out. It never starts right back up, until i let it sit for a min

[95chickn]

Not to be a smarty but does it have gas?

It has gas...

[95chickn]

Ordered new IAC I have to pick up later from autozone.

[tbone]

No fuel pressure. (?)

[95chickn]

If it was the IAC the car wouldn't idle.

So you're saying the engine will start and idle fine, but as soon as you touch the gas pedal, it dies?

It tries to go up, +500rpm. Then falls down and shut off

[95chickn]

Is the maf pointed the correct way?

Yes its the right way

[sam]

Check your fuel pressure sensor they are notorious for going bad

[tbone]

Have you ever changed your fuel pump? If the diaphram is bad it won't hold pressure or pump right. I went the IAC route years ago only to find out the pump was bad.

[Marauderjack]

Diaphram???:confused:

[95chickn]

Have you ever changed your fuel pump? If the diaphram is bad it won't hold pressure or pump right. I went the IAC route years ago only to find out the pump was bad.

I upgraded to i believe 190 ford gt pump. Car started on previous build until motor quickly fail...so idk... I put scanner on live data FRP reads 42lbs... when I turn key it jumped from 92 then 63...im totally lost. Im going to do compression test. Car previous ran HOT on previous build that failed. So i did it right this time... New Cylinder Heads, emp water pump, radiator, today Hitachi IAC valve, new plugs...so you can imagine how PISSED and feed up i am with this car... Is it possible to damage block by previously running hot? I just hope its something simple and i dont have to tear down for the 3rd time

[Black&Gifted]

I was thinking fuel related also.

Take it to Marty? You're closer to him than a lot of us


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[Danger Cart]

Did you try unplugging it & then plugging it back in? :)

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[Zack]

Is there a vacuum leak somewhere? The fuel pressure reading is ok per your scanner. The fuel pump primes, then the Pressure relief valve in the tank bleeds off pressure at a certain psi.

[95chickn]

Just tried to crank car but got a little boom, intake hose popped off and smoke came from air filter :confused:

[Marauderjack]

Cam timing off??:confused:

[Zack]

Cam timing off??:confused:

Starting to sound like this.

OP, disable the fuel pump. Take a video of the car cranking. I can tell if the timing is off just by how it sounds

[95chickn]

I have no idea how to post video...maybe Facebook

[Danger Cart]

Cam timing off??:confused:
That's kind of what I thought from the last bit.

I did the timing belt in my Nissan according to the Haynes manual & it was entirely wrong. More than a few degrees off, it would idle like a diesel... but then the second you applied any throttle it would just cut out. Got the nissan manual, all better now.

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[tbone]

Just tried to crank car but got a little boom, intake hose popped off and smoke came from air filter :confused:

_____________________

[95chickn]

I think i ignored one of the sprockets driver side didnt have strong spring action...i believe that's what causing timing problems...but ill post a video MarauderFacebook

[95chickn]

Just posted video to Facebook Motor City Marauders Car Club - Mercury Marauder Enthusiasts
https://m.facebook.com/groups/105443808800?message_id=101545 43306358801&notif_t=like&notif_id=1483056888608785&ref=m_notif

[Fastbob]

If you are having cam timing issues I sure as heck would not crank the engine anymore.

[RubberCtyRauder]

^^^what Fast bob said. these are interference motors. piston and valve will hit if timing off enough

[Turbov6Bryan]

Just posted video to Facebook Motor City Marauders Car Club - Mercury Marauder Enthusiasts
https://m.facebook.com/groups/105443808800?message_id=101545 43306358801&notif_t=like&notif_id=1483056888608785&ref=m_notif

Notice how the pitch of the motor changes?

[95chickn]

Notice how the pitch of the motor changes?

Yea. Im going to go ahead and order sprocket set

[justbob]

And maybe valves..

That doesn't sound in time at all.


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[Zack]

It is so incredibly easy to time a mod motor. What do you think went wrong? Also, are you positive the intake and exhaust cam did not get swapped by mistake? (It has happened to me)

[RF Overlord]

I did the timing belt in my Nissan according to the Haynes manual & it was entirely wrong. I'm shocked.

Haynes manuals are only useful for lining bird cages.

[95chickn]

It is so incredibly easy to time a mod motor. What do you think went wrong? Also, are you positive the intake and exhaust cam did not get swapped by mistake? (It has happened to me)

Weak sprocket...driver side didn't have tight spring action

[Zack]

Weak sprocket...driver side didn't have tight spring action

Well yeah, because they only work properly when there is oil pressure

[95chickn]

Well yeah, because they only work properly when there is oil pressure

I meant tensioner

[Zack]

I meant tensioner

It applies to the tensioner as well

[Danger Cart]

I'm shocked.

Haynes manuals are only useful for lining bird cages.
I've actually had OK luck with my other Haynes manuals. The one I have for nissans is pretty much worthless.

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[95chickn]

Put tensioner on car cranked and runs smooth, but shuts off when i let off accelerator. But it did stay on long enough for code. P1233. I did put 190 walbro fuel pump but idk if that will keep it from running. Also keep ending up wet when i try to crank back up:help:

[Turbov6Bryan]

Put tensioner on car cranked and runs smooth, but shuts off when i let off accelerator. But it did stay on long enough for code. P1233. I did put 190 walbro fuel pump but idk if that will keep it from running. Also keep ending up wet when i try to crank back up:help:

Video of engine running ?

No bent valves?

What keeps ending up wet?

[95chickn]

Plugs........

[RubberCtyRauder]

P1233 has to do with the FPDM generally

[95chickn]

P1233 has to do with the FPDM generally

Where is this part located?

[RubberCtyRauder]

trunk, driver side, behind panel, towards bottom,below reset switch,air ride switch

[tbone]

If the FPDM was bad I don't think the car would run at all. Mine wouldn't.

[RubberCtyRauder]

the code p1233 just steers you to fpdm, not that it us good or bad, there are 5, 6 things all related to p1233 code. fpdm circuits are just one

[95chickn]

[QUOTE=RubberCtyRauder;1523750]the code p1233 just steers you to fpdm, not that it us good or bad, there are 5, 6 things all related to p1233 code.

I can hear fuel pump come on when i turn keys...
Yesterday it started after i dried plugs n put back in... i held the accelerator down for about 7secords... sounded strong...i tried to put in gear while it was revving and it shut off...

Im going to throw yet another part at it and see what happens FPDM

[Zack]

99.9% chance it's not the FPDM. You don't throw parts at a car to diagnose it.

[95chickn]

I check fuel pressure and scan for codes after that my knowledge is limited...

[95chickn]

Fuel sys1-OL
Fuel sys2- N/A

[ChiTownMaraud3r]

Make sure all your fuses under the hood are good for the heck of it.

[FordNut]

My experience has been that if you put in a bigger fuel pump you also have to get the tune changed.

[massacre]

So it will run in park but not in drive?

[95chickn]

So it will run in park but not in drive?


It will run as long as i hold gas down, soon as I let off it shuts off. Try to start back up it tries but no....then everytime i pull plugs after that first start their soaked with gas

[RubberCtyRauder]

what injectors are in the motor and what is the fuel pressure at the Schrader valve, not with a scanner

[FordNut]

It will run as long as i hold gas down, soon as I let off it shuts off. Try to start back up it tries but no....then everytime i pull plugs after that first start their soaked with gas


My experience has been that if you put in a bigger fuel pump you also have to get the tune changed.

... or it will get too much fuel and run rich.

[FordNut]

There is no reason whatsoever to upgrade a fuel pump if the engine is stock. The OEM pump is more than adequate.

[95chickn]

There is no reason whatsoever to upgrade a fuel pump if the engine is stock. The OEM pump is more than adequate.

Ill switch back... but when I was making post about buying 1 nobody stated these problems....

[Zack]

Remove the vacuum hose from the FRPS and check for gas or gas smell

[FordNut]

Remove the vacuum hose from the FRPS and check for gas or gas smell

Good idea. Sometimes upgrading a fuel pump will result in too much pressure and blowing the FRPS.

[Vostok]

Car has been down for a year?...

Whenever I've done work to mine and it sits for a few weeks the gas turns to crap for whatever reason. (Maybe I need a new tank? Idk)

Pull the fuel rail hose and stick it into a clear jug and prime a few cycles into it, compare to new fuel. On multiple occasions now I end up with a dark yellow.

Symptoms are exactly the same as you described. It would start then die as soon as I hit the gas/intermittent start/no start. Draining out a few gallons and putting new gas solved the problem.

[95chickn]

Remove the vacuum hose from the FRPS and check for gas or gas smell

Smell just like 93 strong:depress:

[Turbov6Bryan]

Smell just like 93 strong:depress:

If you smell GASOLINE in your fuel rail pressure sensor VACUUM hose, then the fprs is fubar

[mrjones]

I'm very late to this party, but starting and not staying running sounds like a chip key problem.

[Zack]

I'm very late to this party, but starting and not staying running sounds like a chip key problem.

Um no. Just no

[Zack]

Replace the FRPS and you'll be good

[RF Overlord]

starting and not staying running sounds like a chip key problem.As Zack said, that's not correct. Earlier PATS system vehicles (through 2002) would crank, but not start. 2003+ will not even crank.

[95chickn]

As Zack said, that's not correct. Earlier PATS system vehicles (through 2002) would crank, but not start. 2003+ will not even crank.

Put new FRPS on and car crank and stayed on for a min and even revved nicely...but ran rough then shut off. Plugs wet again. Smelt a little gas in FRPS. I dont if it would cost me big $$$ but i might have to tow to marty. Such a Beautiful car to have just sitting this loong. I might try 1 last attempt. Put a Genuine Ford FRPS and put new stock fuel pump on... This car seems to be cursed...but I know it cant be that bad of a fix. I need it Professionally diagnosed

[Zack]

What have you done in the gas tank? Sounds like the excess fuel pressure is not being bled off