Question about Cars & Trucks

1 Answer

1997 t100 cold start runs perfect then when I shut it down hot wait a few mins. it;s hard to re-start. Replaced MAF, cts, checked fuel pressure, vacuum

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Cars & Trucks Master
  • 3,103 Answers

Auto shutoff relay faulty..

Posted on Jan 04, 2014

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

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

Hi,
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.
goodluck!

Posted on Jan 02, 2017

Ad
alicantecoli
  • 22156 Answers

SOURCE: 98 Escort Hard starting when hot

sounds like a dodgy mis reading of a sensor caused by electrical resistance which is turning choke on and flooding engine.know the fault but without car in front of me its difficult to diagnose,could be auto choke sensor which is on right hand side of cylinder head ,but not sure.best is probally dealer have you tried spark plug gaps ??25th although this would cause problems with cold starting not hot starting but its worth a look

Posted on Nov 28, 2008

  • 140 Answers

SOURCE: 1998 Chevy tahoe Hard to start when cold

Hello, yes the check valve is in the fuel pump assembly. The check valve is leaking and the pump will burn out soon. Unfortunately the aftermarket fuel pumps can be very unreliable. A good portion of problems we see on this site are from people who replace the pump sometimes twice and it still doesn't work.

Posted on Jan 03, 2009

  • 59 Answers

SOURCE: 97 Ford Ranger 4.0L V6 Idles rough only when cold

Orand

Ther is a air Idle control valve located on the side of the throttle body. unplug it remove it spray it and clean it with carb cleaner replace it plug it back in and you will be a Happy person again.

Lugnut61

Posted on Feb 01, 2009

GM Elec
  • 1000 Answers

SOURCE: 95 saturn won't start when hot

Blair, I would take a look at he TPS (throttle position sensor) located on the throttle body. In other words, it sounds as thought sensor when heated is changing its value to "open" or "shorted".
If the car starts OK when cold, use a hair dryer to heat the TPS when the engine is cold to see if you can duplicate the problem.
Also is the a service engine light on? Codes?
If you have a "digital volt/ohm meter" available you can read the variable resistance of the sensor when the problem occurrs to determine if the sensor is defective.

Posted on Feb 09, 2009

  • 335 Answers

SOURCE: fuel leaking into vacuum line on fuel pressure regulator

If you have fuel on the vacuum side of the reg, that means the reg is leaking,causing a variaty of drivabiliy problems. Replacing this reg is very straight forward. Just add a little lube to the O-ring on the reg before installation. Good luck.
Yours Moe.

Posted on Apr 23, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

98 lincoln town car starts/runs cold,fine for 10-15 miles but once hot , it stumbles & shuts off, It wont respond to anything until is cool again then it starts right up. No codes, PATS is ok,


Something electrical is breaking , shorting when hot ! Crankshaft position sensor , or some other sensor ! Next time it shuts off pull a coil off an see if it has spark ! If there is spark check fuel pressure ! If it has spark an fuel check for a computer pluse , 5 volt reference voltage circuit ! Do you know what that is ? Making Sense out of Sensors

Feb 25, 2017 | Lincoln Cars & Trucks

1 Answer

Hard Start When Cold 01 Bucik Regal


Did you check the fuel pump relay ?
You would need to use a fuel pressure gauge and check pressure before you crank the engine.
When you turn the key switch on, the pump relay is supposed to provide power for 3 seconds to boost fuel pressure.
If fuel pressure is ok, the coolant temp sensor could be telling the computer the engine is warmer than it really is.

Apr 03, 2013 | 2001 Buick Regal

1 Answer

Low fuel pressure 99 cherokee classic


either fuel pump but change fuel filter first and see if it helps

May 13, 2012 | Cars & Trucks

2 Answers

Have a 1997 saturn dohc,,runs for 10 min,and shuts down,,wait 15 min starts right up and runs 10 more min have replaced coil and ecu,,


Check resistance across each of your fuel injectors.Assuming an sl2,resistance should be 11.5 to 12.5 ohms. Measure after it shuts down. You are looking for one that has low resistance. This is not for sure, but it's a good thing to eliminate.

Oct 22, 2011 | 1997 Saturn SL

1 Answer

1997 Toyota T100 - Truck seems harger to start. I have always been able to start the truck with the turn of the key immediately. At first it appears to be only with a hot start, now it appears to be...


Most likely the fuel pump is failing, the fuel pressure check valve is defective and the system loses pressure the long crank is due to this loss of fuel system pressure.

Jun 23, 2017 | 1997 Toyota T100

1 Answer

Truck turning over but not catching


You need 3 things.
Compression
Good hot blue spark to all plugs.
Good gasoline and proper fuel pressure. 63-64 lbs.
If you have all 3 then move on to injector pulse to all injectors.
I think each injector is on a separate driver on that one.
Check for pulse to all of them.

You may be weak on fuel pressure . even a couple of lbs low on a cold start will cause a no start.
Double check cold start cranking fuel pressure. If under 63-62 lbs you have problems.
one test is to give it a squirt of carb cleaner not starting fluid. If it starts then you have a fuel pressure problem.
Run the full fuel pressure test and post back pressures.
Here is the guide lines on testing.
Hard to start cold.
Check cold start fuel pressure.
Check engine running fuel pressure.
Check engine running on the road fuel pressure.
Then shut it off and watch for fast leak down.
Pinch off at rubber part or block off return line and check full pressure.
Later V6 and V8 gm engines should have 60-66 fuel pressure.
Cold start should be 64-65 lbs of pressure.
If you do not have full fuel pressure on a cold start the injectors will not squirt fuel.
Do not leave home without it.
Engine running should be 60-66 lbs pressure depending on engine load.
Full pressure with return pinched off should be 75-85 or more.
And if it has a fast leak down after shut off you have a leak.

The 75-85 is only a check on the capable full pressure of fuel pump.
If you can not find the rubber return line check full pressure by plugging return line or just or the true full pressure can be taken direct at the end fuel filter.
What are the pressure readings that you have done.
What are your cold start pressure readings?
Post back what you have.

The other thing to is when was the last time the fuel filter was replaced? The fuel filter may have got to the end of it's like and may need to be replaced, the fuel filer should be replaced every 15,000 miles or once a year to ensure the fuel system is running 100%.

Good luck and keep me posted, be glad to help you get your blazer running again soon.

Jan 10, 2010 | 1997 Chevrolet Blazer

2 Answers

1997 chevy blazer getting fuel and spark but not starting, only backfiring through carb.


You need 3 things.
Compression
Good hot blue spark to all plugs.
Good gasoline and proper fuel pressure. 63-64 lbs.
If you have all 3 then move on to injector pulse to all injectors.
I think each injector is on a separate driver on that one.
Check for pulse to all of them.

You may be weak on fuel pressure . even a couple of lbs low on a cold start will cause a no start.
Double check cold start cranking fuel pressure. If under 63-62 lbs you have problems.
one test is to give it a squirt of carb cleaner not starting fluid. If it starts then you have a fuel pressure problem.
Run the full fuel pressure test and post back pressures.
Here is the guide lines on testing.
Hard to start cold.
Check cold start fuel pressure.
Check engine running fuel pressure.
Check engine running on the road fuel pressure.
Then shut it off and watch for fast leak down.
Pinch off at rubber part or block off return line and check full pressure.
Later V6 and V8 gm engines should have 60-66 fuel pressure.
Cold start should be 64-65 lbs of pressure.
If you do not have full fuel pressure on a cold start the injectors will not squirt fuel. Do not leave home without it.
Engine running should be 60-66 lbs pressure depending on engine load.
Full pressure with return pinched off should be 75-85 or more.
And if it has a fast leak down after shut off you have a leak.


The 75-85 is only a check on the capable full pressure of fuel pump.
If you can not find the rubber return line check full pressure by plugging return line or just or the true full pressure can be taken direct at the end fuel filter.
What are the pressure readings that you have when done.
What are your cold start pressure readings?
Post back what you have. Good luck

Dec 24, 2009 | 1997 Chevrolet Blazer

3 Answers

2001 Dodge Ram 2500 HO Cummins 6 Speed


TAKE IT TO A MECHANIC !!!!!!!!!!!!!!

May 31, 2009 | 2001 Dodge Ram 2500 Truck

1 Answer

1999 Tahoe 5.0 Very hard starting, sometimes requires starting fluid to get started. once started runs fine. Has had a full tune-up, new fuel filter. Fuel pressure has been checked and is ok. 2 different...


The most common cause of this condition is the check valve in the fuel pump failing, to check this hook up a fuel test guage to the fuel rail test port, run the engine for a moment and shut it down, after shout down the pressure should stay within 5 PSI of the pressure at shut down after sitting overnight, if it doesn't then the fuel pump must be replaced, the reason is the fuel drains back to the tank if the valve is defective, so you get air and no real pressure on cold start, A check of pressure on a hot running engine will not show this fault, also make sure you are usine the correct Octane of fuel, Prem fuel in a regular fuel engine will cause cold start and stalling issues in cold weather.

Nov 29, 2008 | 1994 Chevrolet Beretta

4 Answers

1998 mazda 626 stalls


plugs/wires, fuel pump, fuel filter, maf, bad fuel pressure reg. depends on what it drives like, hard to answer without driving it

Jun 26, 2008 | 1988 Mazda 626 Turbo

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

Related Topics:

54 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cars & Trucks Experts

yadayada
yadayada

Level 3 Expert

76070 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

Loading...