HARD TO COLD START

  • Tiny
  • Arohl
  • Plymouth Voyager

I own a 1994 Plymouth Voyager SE.

A front wheel drive 3.0 L V6 with Automatic overdrive transmision. It has 170, 000 Km or just over 100, 000 miles (original).

History:

1 - it sat for about 5 years
2 - in 2002, it was started and ran well for until last year
3 - in 2005, the A/C compressor seized on us, no more A/C
4 - in summer 2006, the fuel pump went and replaced, along with the inline filter by the chasis
5 - in late 2006, cold starting is started to be a challenge until now it just juggles and dies. Now it sat in the garage. When it starts, it would run fine when it is warm.
6 - 3 experienced mechanics tried to solve this problem with no answer
7 - sympstoms: starts & putt-putt-putt & dies with NO ENGINE CODES!
8 - things that has been replaced - distributor cap, rotor, whole distributor, water temp sensor, all spark plugs, all ignition wires, air filter, pvc valve filter, engine computer (twice)
9 - things has been checked - no engine code, fuel pressure at 45

Could the fuel flow be questionable even the pressure checked out good?

I am thinking of changing the fuel pump. Would this be worth a try? The other mechanics think not.

I've spent quite a bit of money and time. I asked another mechanic for his opnions and he jokingly tld me that there is one thing that I haven't changed. I asked what it is. He said the Van itself.

Do you have any idea?

Help,
Arohl

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Sunday, September 23rd, 2007 AT 12:15 AM

10 Replies

  • Tiny
  • rasmataz
  • Member

I would recheck the fuel pressure again and pull the vacuum hose at the pressure regulator you see fuel in it -bad regulator.

Do the pressure check KOEO and KOER

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Sunday, September 23rd, 2007 AT 5:05 AM
  • Tiny
  • Arohl
  • Member

Where would I find the fuel regulator? Can you describe the look or approximate location?

If you have a picture that would be handy. Thx.

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Tuesday, September 25th, 2007 AT 9:26 PM
  • Tiny
  • rasmataz
  • Member

A 2.5 has TBI- yours must be a MFPI system find the fuel rail its attached to it. Or the fuel line follow it will lead you to it. It looks likes a small canister with a vacuum hose.

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Tuesday, September 25th, 2007 AT 10:58 PM
  • Tiny
  • Arohl
  • Member

OK, I will look into it this week. Thx!

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Wednesday, September 26th, 2007 AT 7:51 PM
  • Tiny
  • Arohl
  • Member

I replaced the fuel pump, filter and pressure regulator.

The car now starts but still a rough start.

It takes a few starts before it gets going. That's with my foot to the floor.

I also noticed the Automatic Transmission Fluid is low. I put in 2 liters and still need more.

Could this fluid leak into the engine and cause this starting problem?

Where should I go next?

Thanks,
Arohl

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Wednesday, March 19th, 2008 AT 12:21 AM
  • Tiny
  • rasmataz
  • Member

Test the coolant temperature sensor/idle air control motor and throttle position sensor.

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Wednesday, March 19th, 2008 AT 3:28 AM
  • Tiny
  • Arohl
  • Member

I've changed the following:

- Coolant temp sensor
- Distributor assmebly
- Cap & rotor
- Ignition wire set
- All spark plugs
- Air filter
- PVC filter
- Fuel pump
- Fuel filter
- Fuel pressure regulator
- PCM

What do the Idle air control motor and throttle position sensor look like and where are they located?

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Thursday, March 20th, 2008 AT 11:13 PM
  • Tiny
  • rasmataz
  • Member

Idle air control motor and the throttle position sensor-See below


http://www.2carpros.com/forum/automotive_pictures/12900_IAC_motor_and_TPS_1.jpg

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Friday, March 21st, 2008 AT 4:50 AM
  • Tiny
  • Arohl
  • Member

Thanks for the picture!

What kind of testing should I do?

Continuety test?

Resistance test?

Voltage test?

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Tuesday, March 25th, 2008 AT 8:45 PM
  • Tiny
  • rasmataz
  • Member

You can perform all 3 of them.

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Wednesday, March 26th, 2008 AT 6:17 AM

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