Question about 1991 Ford F350

1 Answer

Ford f350 7.3l diesel carnks but won't start

Hass new wiring harness, fuel pump, alternator, glow plugs some and relays.
What else?
Done the check for water in engine.

Posted by on

  • 7 more comments 
  • amberscot10 Feb 16, 2009

    i'll check that. been sitting 6 months bc batteries were dead. got new batteries and now this.

  • amberscot10 Feb 16, 2009

    i'll check that. been sitting 6 months bc batteries were dead. got new batteries and now this.

  • amberscot10 Feb 16, 2009

    i'll check that. been sitting 6 months bc batteries were dead. got new batteries and now this.

  • amberscot10 Feb 16, 2009

    Battery is good.

    IMy rpms only go to 4 on this truck so it was not really moving. The tach thing is that the milage? it shows the digital milage. if it is the thing in the middle where the speed is, of course that didn't move.

  • amberscot10 Feb 16, 2009

    Battery is good.

    IMy rpms only go to 4 on this truck so it was not really moving. The tach thing is that the milage? it shows the digital milage. if it is the thing in the middle where the speed is, of course that didn't move.

  • amberscot10 Feb 16, 2009

    Battery is good.

    IMy rpms only go to 4 on this truck so it was not really moving. The tach thing is that the milage? it shows the digital milage. if it is the thing in the middle where the speed is, of course that didn't move.

  • amberscot10 Feb 16, 2009

    Battery is good.

    IMy rpms only go to 4 on this truck so it was not really moving. The tach thing is that the milage? it shows the digital milage. if it is the thing in the middle where the speed is, of course that didn't move.

  • amberscot10 Feb 17, 2009

    ok, my dad said all of that is fine, but what is GPR?

    He is thinking something with fuel or fuel pump, but it is new.

  • Anonymous Mar 16, 2014

    Removing alternator and wiring harnesses
    not enough room and can't see the harness attachment

×

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that hasĀ over 10 points.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 6 Answers

Check your battery voltage while cranking. If it's too low, the electronics won't work and the injectors won't fire. If the batteries are down a bit, there won't be enough power to turn the engine over fast enough to start. It needs a minimum of 100 rpm and 8 volts while cranking. You also might try waiting till you're sure the GPR has dropped out. That takes the GP load off the batteries and may get the voltage up enough to get it to start, oh and also does the tach move when you're cranking? If not, then chances are the CPS is the culprit.

Posted on Feb 16, 2009

  • 1 more comment 
  • h22rocket Feb 17, 2009

    your tach is what measures revolutions per minute its pretty

    typical to be calculated x1000

  • h22rocket Feb 17, 2009

    rpm tachs typicaly look like this, the crome thing attached to the steering column, some ford truck dont have them but u can get after market ones

  • h22rocket Feb 17, 2009

    you GPR is your glow plug relay

×

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Why the diesel pump nissan hardbody is not getting the power


DIESELS DO NOT START FOR ONLY 3 REASONS.. 1. not getting fuel. 2. Glow plugs not working.. 3 major engine damage
1. air in system.. like you ran out of fuel, Fuel filter clogged, lift pump not working, no fuel in tank, Bad fuel. .. 2. glow plugs..check the wire at the glow plug to see if it has power. If it does not check the relay and fuse. glow plugs usually do not all go bad at one time. 3. major engine damage.. you would normally notice this by the noise the engine makes or it would not turn over..

May 25, 2014 | 2000 Nissan Maxima

1 Answer

1991 f 350 wont stay running7.3 deisel new injecters new glow plugs new fuel filter have to put gas on a rag and cover intake starts but u put into gear and dies


Many things to check. Wonder if this work was done to alleviate problem or problem was from doing the work.

Putting gas fumes in a 21:1 compression cylinder is sure way to ruin engine.

2 possible problems are losing your diesel fuel draw from an air leak in the fuel lines and an inoperative glow plug timer.

When you change a fuel filter you lose the vacuum lock that is in the fuel lines. Some mechanics add fuel to the new filter to remove some of the air and promote fuel draw. The O rings on the injector lines are a special type which resists petroleum products. Using cheap O rings will cause problems.

Glow plug timer-there is a power Relay to the timer and the timer itself is a type of Relay. You should hear clicking noise and lights should dim as timer provides power to the glow plugs.

Other things to check would be the Vacuum pump as Diesels work differently than gas engines and require a pump to supply Vacuum. Covering the intake suggests engine needs a Vacuum draw.

Weak fuel pump. Too weak to pressurize or draw fuel. Can be measured with pressure gauges.

Really bad rings could also cause symptoms.

Would be interested knowing what proved to be wrong.

Sep 29, 2013 | 1989 Ford F 250

1 Answer

94 f350 diesel that won't start


those have a wiring harness thats part of the v. cover gasket common prob. hope that helps

Jun 06, 2012 | Ford F-350 Cars & Trucks

2 Answers

Ford F-350 7.3L Powerstroke Diesel very hard to start when cold.


have you ever replaced the glow plugs on your truck.this would be the first place to start with a cold start problem.the next thing would be a fuel pump problem to check.

May 19, 2011 | Ford F-350 Cars & Trucks

2 Answers

Won't start but cranks has 300k miles. Check fuel pump working, replace glow plugs, checked fuses and relays, fuel pump won't come on but works hooked it direct to battery, wait to start light does not...


If you can't pull the codes from the pcm it has either died or lost it's ground assuming it has power. I would try to get a wiring diagram and check both the power and the ground for the computer itself, because it is what turns on the pump and the wait to start light.

Feb 25, 2011 | 1999 Ford F350 Regular Cab

3 Answers

Expert van 2lhdi 2005 very poor starting in cold weather had glow plugs and relay fitted still no better. i only do 3000 a year and mainly short jouneys less the 5 miles. new battery last year. it does...


Firstly fit a manual overide to the heater plugs .relay -push button type switch -wire -connectors ,run a wire direct from battery to relay ,other side to heater plug relay output so it feeds all the heaters ,push button inside cab with a 12v feed from ignition switch running to relay then other side of relay to earth ,leave vehicle on charge often on trickle charge where possible ,also on a full tank of diesel put in a litre of petrol to stop diesel waxing up ,nice old rug or blanket over engine and it will first time every time ,only use the petrol when weather below minus 5c though ,great vehicles these peugeots but i do like my ford transit

Dec 19, 2010 | Peugeot 604 Cars & Trucks

1 Answer

85 ford 6.9 diesel, the "wait" light does not illuminate, engine turns over but will not start. originally the "engine temperature" light was on, replaced both temp sending units, but still not work. is it...


Have you checked for power on the fuel shut-off solenoid on the injection pump? There are two wires to the pump. One is the fuel shut-off the other is the cold advance. Both should be hot with the key on when the engine is cold. Do you hear the glow plug relay clicking when you turn the key on?

May 16, 2010 | 1985 Ford F350

1 Answer

Problem with cold starting Ford 7.3L Diesel at > freezing temps


most likely the relay. its located to the left of the fuel filter( looking at the motor from the front). my experience is that they only last about 50,000 miles. the part costs about $20 at an navistar dealer. remove the cowl over the filter, disconnect the batteries(so you don't short the new relay out if you cross the polarity with a wrench) ,remove the four wires from the ceramic relay, un-fasten the relay from the base. reverse the process with the new relay. CAUTION; do not over-tighten the nuts on the wire studs, you could crack the ceramic relay.(iv'e done it) . hope this helps

Mar 17, 2009 | 2001 Ford F250 Super Duty Super Cab

1 Answer

Volks wagen golf diesel tdi Nreg


Check the glow plug thermo sensor...found in the cylinder head.
Unlightly anything wrong with injector pump.
Good luck
John

Feb 15, 2009 | 2002 Volkswagen Jetta TDI

1 Answer

Glow plugs


glow plug wire harness under valve covers often deteriorates causing no glow plug heating. The connectors and wire terminals are available from Ford as a kit or individually. Do not replace the harness. $600!
Still need the fuse panel circuit? Look in owner manual.
glow plugs use a relay too.

Jan 19, 2009 | 1989 Ford F 350

Not finding what you are looking for?
1991 Ford F350 Logo

916 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts

yadayada
yadayada

Level 3 Expert

61037 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Fordexpert

Level 3 Expert

5331 Answers

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

Answer questions

Manuals & User Guides

Loading...