Question about Cars & Trucks

1 Answer

Have 05 srt4 hahn 20g turbo full areomotive fuel system full 3inch exhaust stock pcm car falls on its face

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    A rookie expert who has answered 20 questions on their first day.


    An expert who has answered 20 or more questions within one hour.

  • Expert
  • 62 Answers

Has it been tuned? check the parameters on your o2 sensors

Posted on Nov 05, 2012

6 Suggested Answers

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

  • 59 Answers

SOURCE: 2005 PT Cruiser 2.4

I think it sounds like your CAM sensor has fallen off or is faulty.

The computer controls the ignition timing and the injectors to squirt fuel in to the pistons at the right time. If the computer doesn't sense the cam angle correctly as you accellerate it can't put fuel into the pistons to match the opening and closing of the valves.

If you have a manual you can strip down the top of the engine to see the timing gears on the end of the Cam shaft and see if you can see the cam sensor and if there is anything obviously wrong (i.e. its missing) but you may be as well getting to the dealer to have it checked out and fixed. So the good Fuel pressure will not really effect the engine falling on its face as its a computer timing issue caused by bad sensor information that's causing the bad running.

Posted on Jul 31, 2008

  • 22156 Answers


dealer only ,factory immobiliser

Posted on Jun 22, 2009

  • 1586 Answers

SOURCE: 92 Honda civic LX hessitation.

Did you have the computer reflashed for the new injectors? If not, you have to do so. I don't know how much bigger than stock your new fuel injectors are but if it's more than just a little bigger, and you don't reprogram the computer, your mixture is going to be way too rich and you'll be stumbling. Have the ECU reprogrammed to properly control the injectors - many modifications don't affect, or are not affected by, the ECU, but injectors aren't on that list. If you did reprogram it, it may be simply because larger injectors aren't as precise when flowing slowly or at small duty cycles. There's also the chance that one or more are leaking slightly although that's not as common.

Posted on Jan 22, 2010

  • 1016 Answers

SOURCE: On my 2001 Audi TT


Could you let me know if it is a GT3071 or GT3071R.

GT30 is the series of Garret family it belongs too...

Posted on Aug 19, 2010

  • 229 Answers

SOURCE: Engine bogs/sputters before reving out when 3/4 to

if no codes are comming across try replacing the wires!! possible cracked wire arching and not getting noticed..

Posted on Mar 02, 2011

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

I have a 1987 Isuzu Impulse turbo with a T3T4 turbo and intercooler installed. It won't idle. Accelerator to the floor is the only way it'll stay running. What will fix this?

well if car is stock, is it? is PCM stock and matches your turbo?
no engine stated. 4Ez1 or 4xc1, 4zc1-t (my guess last one)
there is also a EZ1 turbo too...
we start with basics.
did you run the diag flash codes yet? jumper?
ALDL pin 1 to 3. for code 12 (ok) 3 is ground wire.

1: compression ok. 150psi on all cyl? min?
2: spark timed right?
3: cam timed right?
4: all sensors reading right? (scan it for bad reading sensors?)

i can see there is no MAF sensor, so is MAp BASED
are all these parts stock???? and matching your setup?

the map and IAT ,(and pcm tables) are used to calculate all fueling rates. The map is baro sensor. air pressure (called vacuum)
and the pressure drop, is what causes fuel rates to rise.
turbo or no turbo.

if car is not stock now's that time to fess up. ?
and full spec. of whats there. as we can not guess any of that.

the 4zc1-t
i see it has an I-tech unit and an turbo controler
and and air modulator, device, (no clues to what it does)
id recommend buying a REAL FSM to work on this complex setup.


or login to and read that huge section on diagnostic.
i see it injects in pairs too. (PCM does that)
and has DIS wasted spark coils.

Sep 06, 2015 | Isuzu Cars & Trucks

1 Answer

Fuel system on an 05 mustang is a return less system I'm going to turn it to a return and i have some parts fuel regulator,fittings, dual pumps , fuel line. So I'm i going to need a an electronic pump...

ok the returnless system is totally differernt.
the regulator is in the pump and tank,
not knowing the reason, we can not help you,
running 2 pumps, huh? a lift pump and a pusher pump, what?
1: turbo added
2: for fun?
3: dont like loopless.

the stock system has a loop , its just dont leave the tank.
some cars have a mini tank near the fuel rail.
but most use the tank loop.
the pump is regulated then the return goes back to the main gas tank
the OEM Ford and others, puts a fuel pressure sender there.
because there is no vacuum regulator at the rail
the PCM then reads the pressure and adjusts pulse width to the injectors based on load .
The old system used vacuum to control the pressure directly
the new system Does not do that. at all.
there is no vacuum line going to the fuel tank
and at full throttle there is no vacuum at the injector tips
and as such will squirt too much fuel so the regulator drops the pressures about 6 psi. (from idle pressure)
here is what needs to happen.
you just need a pump that works. and is rated for WOT fuel flow.
and the correct pressure set to factory spec, ford, pressure.
then use any manual regulator to set the pressure spec, pressure.
it never changes, then the stock fuel pressure sensor will report that
and the PCM does all the heavy lifting (calculations by magic)
that is how it works.

not knowing what you are doing so we can get on the same page makes all this impossible.
you are re-engineering the fuel system. so.... need to know that.

Im here,???
i want to go there. where and why.?
go to amazon dot com, type in greg banish books.
bingo read his books, (i have it on NOOK) for cheap.
it covers how loopless works and how it is tuned, to the finest details.

most folks down know why MPI systems drop 6PSI at wot.
it is because the reg is 1:1 reg for each pound of air pressure drop
so does the fuel pressure.
this magic on the old cars, keeps the differential pressure
ACROSS the injector the same at any throttle angle.
you car don't do that. at all. now.

and if you made it do that , id bet the PCM would go quite nuts.
it wants a static pressure. now.

Jun 06, 2014 | Cars & Trucks

1 Answer

Obd system not registering on test instruments

Check that the oxygen sensor is not covered with oil residue or soot makeing it inoperative and not telling the cpu what the fuel setting should be.

Feb 21, 2013 | Cars & Trucks

1 Answer

1998 Ford Taurus OHV 3.0L. Just replaced both heads. One head was cracked around all three exhaust valves and the valves, seats, seals, and guides were cooked in the other head. Now replaced the car seems...

it could be a poor fuel pump not suppling enough fuel to the injectors when required,a fuel pressure test and flow test should be also could be a cat as when your accelerating you are trying to push out as much exhaust gas as possible and if the cat is plugged it causes back pressure to the point the exhaust stops flowing causing the car to fall on its face.then when you back off there isn`t as much exhaust gas to push out the exhaust system and it runs can get an exhaust back pressure test done to see if this is a problem.

Apr 24, 2011 | 2005 Ford Taurus

1 Answer

I have an talon esi I I put a intercooler blow off valve cool air intake I am about to put a 14b turbo in and I was wondering how much boost it will handle with out blowing up I got bigger injectors coming...

There are dsm forums in which you can get good help and support for this. I believe stock they can handle 10-13 psi. Before I would increase the boost to anything over that I would replace the internals with performance parts and change out all of the studs( head, exhaust, and intake) with ARP performance studs and also change the gasket set to a high performance set to. Also you will have to get a programmer to change how the cpu is running the engine for the increase in fuel. There is alot involved when tuning a car and one wrong move you can kiss that motor goodbye.This would be a good place to start learning the in's and out's of tuning your specific car..........
also get a balance shaft eliminator kit it will save your some trouble and free up a couple of horses.

Dec 06, 2010 | 1993 Eagle Talon

1 Answer

Looking for instail instruction to put my turbo kit on my scion tc i am tech ive workt on cars all my life but have never done a turbo kit

Before you start on your turbo kit, you need to make sure you can tune your PCM for the added turbo kit and that you have an fuel system to support the extra boost.
The turbo kit installation is the easy part, having the fuel system and PCM program is another. Not having the right program will cause you an expensive project, keep me posted, be glad to help you get your turbo installed without additional expensive cost.
Thank you for using fixya and post me back.

May 11, 2010 | 2009 Scion tC

1 Answer

Turbo keeps cutting out, mainly on incline or declines, could this be fuel filters.

Could be one of many things. First off if you can"t remember the last time you changed the fuel filter (there's only one, and it's in plain sight) then do it. It should be replaced every 20k miles. If i were to guess though I would start to look at the turbo actuator system. The turbo is engaged by vaccuum. there's a vac pod on top of the turbo with a vc line going to it. At idle, when you don't want boost there is no vaccuum sent to the actuator pod. The pod is connected to vanes in the turbo that direct the exhaust flow either into or around the blades. Under full throttle vaccuum is sent to the pod to move the vanes inside the turbo to direct exhaust into the blades causing it to spool up and give the car some zip. I have replaced quite a few of the pods. Here"s some more to think about...

Vac is generated by a vac pump off the back of the camshaft. Check to see if there is at least 15" of vac.

VW doesn't provide a port to measure boost. Anywhere. In my opinion all turbo cars should have a boost gauge. Either install one- it's not hard, or get someone with a type scanner and see what the boost is. Stock I think was a lazy 13psi under acceleration

Use a vac pump, hook it to the line going to the vac pod on turbo and make sure it HOLDS vac.

other poss. causes- vac leak somewhere else, check all lines

turbo crusted up inside

something else weird.

When you find the problem please let me know. Im curious...

Dec 13, 2009 | 2001 Volkswagen Golf

1 Answer

88 dodge shadow idles very ruff. pedal to floor to start.

i have an 88 dodge shadow turbo with a five speed. the car will fall on its face at 5500rpm coming out of first gear. and its rpm range gets lover with each gear. the fuel pressure rises when it fall on its face. the car never dies just falls then picks back up and will fall again unless you keep it under the that rpm. then it is fine. what could be the problem?

Jul 17, 2009 | 1988 Dodge Shadow

1 Answer

Turbo spooling too high

Sounds like the gate valve is stuck. This valve dumps excess pressure when the turbo makes it.

Dec 14, 2008 | 2006 Dodge SRT4

1 Answer

Down SRT4

I hope to god he replaced the clutch. The older srt4's have a horrible design flaw where instead of having the flexplate heat up and warp and stop working alltogether, it grenades and takes out the transmission and sometimes the intake manifold. There are horror stories all over the internet.

As for putting in a different computer it should all work fine if it's the same year. I've heard of people switching ecus to see if the ecu was the problem. It sounds like he has a decent amout of money into the car so instead of going with the factory ecu have him buy an aem ems. It's a stand alone performance based aftermarket computer. If you want to have full control over your engine a stand alone ecu is the way to go.

There are also cheaper ones but aem is one of the best and pefered by most tuners.

If he has any problems have him join that forum, fixya is more for generic questions. I'm sure that forum will have more than enough information for your son.

Sep 16, 2008 | 2006 Chrysler SRT

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

57 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cars & Trucks Experts


Level 3 Expert

75822 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Randy Ohler

Level 3 Expert

14585 Answers

Are you a Car and Truck Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides