Question about 1999 Ford F250 Regular Cab

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Service soon light on code 1391 keeps appearing

I have replaced the glow plug relay and code still present

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Check for bad glow plug

Posted on Apr 13, 2014

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Posted on Jan 02, 2017

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SOURCE: I just replaced the glow plug relay dur to hard starting

HAVE YOU REPLACED ALL YOUR GLOW PLUGS RECENTLY? EVEN THOUGH THE GLOW PLUGS APEAR TO BE WORKING I FIND WITH AGE THEY NO LONGER HEAT UP QUICKLY ENOUGH BEFORE CONTROLER TIMES OUT. THEREFOR CREATES A HARD OR NO START CONDITION.

Posted on Feb 10, 2009

  • 147 Answers

SOURCE: Just changed plugs running well 1 day later

hello
make sure the plug are gaped properly, check connector and vacc lines to the EGR, if the code comes back first check diapharam with a vac pump if it ok just clean the valve and passages do not use carb cleaner it has lubricant that can gum up in high temp, brake cleaner will work best.
good luck

Posted on Jan 13, 2010

  • 14 Answers

SOURCE: my wait to start goes off immediately. i replaced

glow plug controller

Posted on Jan 20, 2010

  • 5537 Answers

SOURCE: 1987 Ford f-250 6.9 liter

Check for fuses first. The Glowplug timer is the proper name for the part that responds to Temperature when starting your engine. When the engine is cold, of course it is on longer and can cycle making a click and intermittently dimming the lights on your truck. When the engine is warm, your gowplugs may not even fire as the engine is using compression alone to fire up.

Also, Ford did make a Severe Weather model that kept the glowplugs on longer. If you stay in Alaska or a climate with consistent subzero temperatures you may need it.

Posted on Nov 16, 2010

  • 367 Answers

SOURCE: I have a 2003 ford

Instead of going crazy and throwing parts at it, buy or rent a scan tool.

Posted on Mar 12, 2011

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My 97 f250 supercab with a 7.3 has a 1391 and a 1393 what needs replacing.


generic p1391 is CMP or CKP Sensor Signal Intermittent Conditions.
p1391 code Ask com YouTube Search this link is codes more for chrysler ---the following codes pertain to your vehicle p1393 is Glow plug circuit low input, bank #2 (left) Open/short/miswired circuit, ... ---- p1391 is Glow plug circuit low input, bank #1 (right) Open/short/miswired circuit, faulty relay, glow plugs.
An Introduction to the Power Stroke Glow Plug System this link will explain and assist in repair

Aug 07, 2016 | Cars & Trucks

1 Answer

Have 97 dakota v6 i keep replacing 1391 andpo351 plugs and wires


Not sure I am following your story.
Code 351 is a problem with the primary OR secondary circuit for the coil.
Code 1391 is a problem with the ABS system.

Dec 21, 2012 | 1999 Dodge Intrepid

1 Answer

What does error code po671 mean


HI,
http://engine-codes.com/p0671_gmc.html

It's a Glow Plug.

Possible causes- Cylinder #1 glow plug circuit is open or shorted
- Faulty cylinder #1 glow plug
- Faulty glow plug modulehelp.png Help with thisSymptoms- Engine Light ON (or Service Engine Soon Warning Light)
- Lack/Loss of Power
- The engine may be harder to start
- Engine hesitation

Read more: http://engine-codes.com/p0671_gmc.html#ixzz28UT1VO75

Oct 06, 2012 | 2008 Dodge Sprinter

1 Answer

WHAT IS DTC-01 P0673 ON A 2500 HD


OBD Code P0673refers to
The Engine Control Module (ECM) has detected a fault in the cylinder #3 glow plug circuit SymptomsPossible sumptoms of OBD code P0673
- Engine Light ON (or Service Engine Soon Warning Light) - Lack/Loss of Power - The engine may be harder to start - Engine hesitation CausesPossible causes of OBD code P0673
- Cylinder #3 glow plug circuit is open or shorted - Faulty cylinder #3 glow plug - Faulty glow plug module

Jul 09, 2011 | GMC Sierra 2500HD Cars & Trucks

1 Answer

A Deisel jetta need to replace glow plug rely ,,where is it..?? And its very very hard to start ..is this going to do it and how do you know if the deisel is worth keeping it has like 300,000 _ thanks...


not always the golw plugs can be bad and the engine can be low on compression. does it start alot better if you add a gallon of kerosene to 5 gals of desiel? Or a quaart of gas? the glow plugs can be checked with a test light the connectrs are in plain veiw and the wires going to them are big. Follow the wires back to the relay they go straight there, the relay is real close to the battery as it draws alot of power follow the big wire on the battery that doesn't go to the starter and thats the glow plug relay. they last good but the connections get dirty, reconnect all the connectors on itand see with the key on if the glow plug light comes on on the dash that wire that lights the light is the same wire that lights the light fires the glow plugs. You can take the wire off the glow plug( you need to do it anyway it's a yearly service anyway and with a test light connected to power touch the disconnected glow plug with the lights probe and the light should light, not all of them are likly to be bad but if you find two or more just change them all as the ones that aren't out are likly to fail anytime and if you want to drive though the winter you need all the help you can gt. the battery cables and the one going to the glow plug relay are likly to fail at the battery so go over this good It might start fine with just two glow plugs working I'd pick the two center cyclinders or the two outboard ones as once the engine starts it'll keep running long enough to start the other ones. low voltage as your cranking can effect the glow plugs but the relay is suposed to turn the glow plugs off at cranking and time out after they've been on long enough. dirty connections are almost always the problem so clean everthing before you replace anything. Needs cleaned before yu put on new parts anyway and the glow plugs need to be taken out with the right tool or you may end up with a broken off glow plug in your cyclinder head.

Oct 01, 2010 | 1991 Volkswagen Jetta

1 Answer

My 2003 Renault Megane Scenic 1.9dci expression won't start


The funny sound you mentioned must be identified, could it be the starter trying badly to turn. Here the fault of your battery drain is that the glow plugs take a lot of current and it must NOT come ON when the starter motor runs. Hence the fault could be your GLOW plug relay unit with the auto cut off timer that is faulty. If you keep draining the battery to a lower threshold level , there is every possiblity that the battery life will be lowered . I hope the present battery rating is the recommended Amp/hr rating to give the extra run for the morning start. Next area of suspicion is the starter motor itself , it could have a bad commutator or a bush. It will be good to have a clean up and service. Finally check for excessive drain on your battery with a current check in series for the drain current when the switch if off. If the current exceeds the limit disconnect each circuit to confirm. hope this advice helps. good day

Jul 22, 2010 | 2003 Renault Sportwagon

1 Answer

Glow plugs flashing when engine is running


HI. This is an indication of a failing glow plug. It will be necessary to test each plug to isolate the issue, or run a diagnostic scan on the CPU. During the scan, you should be issued a code that will isolate the actual glow plug that is malfunctioning. If you insist on testing each plug, use my procedure below to assist. You can find the resistance specs in your operators manual.


A test light can be used to determine if the glow plugs are working.


1. With the test-light grounded, insert the test light probe into a glow-plug wire to check for continuity.

2. If the light comes on, check the other cylinders in the same manner. If the test light failed to light, check for continuity at the glow-plug relay.

3. If no power is present, check the control circuit of the glow plug relay.

4. If the control circuit is working, the relay may be defective (FYI, manufacturers may have the system fused and fusible links may be located throughout the system).

5. If the glow-plug circuit is working, the glow plugs themselves may be defective.

Checking glow-plug resistance:(Remove the plug for this test)

1. With an ohmmeter, connect one lead to the terminal and the other lead to the body.

2. Read the resistance and compare to specifications.

3. A visual inspection may also be necessary to check for excessive carbon buildup and physical damage to the tip.

4. A glow plug that has excessive carbon deposits on its tip can give the correct ohmmeter reading but still not work. Clean the tip with carbon cleaner.(DO NOT USE A BRUSH TIP CLEANER)

Jan 06, 2010 | Ford Focus Cars & Trucks

2 Answers

Engine turns will not fire up glow plug sign flashing


HI. Usually, when this light illuminates, it will signal that one, or more of the glow plugs are malfunctioning. I recommend to test all glow plugs, so that you may isolate the defective plug.

A test light can be used to determine if the glow plugs are working.


1. With the test-light grounded, insert the test light probe into a glow-plug wire to check for continuity.

2. If the light comes on, check the other cylinders in the same manner. If the test light failed to light, check for continuity at the glow-plug relay.

3. If no power is present, check the control circuit of the glow plug relay.

4. If the control circuit is working, the relay may be defective (FYI, manufacturers may have the system fused and fusible links may be located throughout the system).

5. If the glow-plug circuit is working, the glow plugs themselves may be defective.

Checking glow-plug resistance:(Remove the plug for this test)

1. With an ohmmeter, connect one lead to the terminal and the other lead to the body.

2. Read the resistance and compare to specifications.

3. A visual inspection may also be necessary to check for excessive carbon buildup and physical damage to the tip.

4. A glow plug that has excessive carbon deposits on its tip can give the correct ohmmeter reading but still not work. Clean the tip with carbon cleaner.(DO NOT USE A BRUSH TIP CLEANER)

Oct 22, 2009 | 2003 Jaguar X-Type

1 Answer

Can anyone tell me where to find the glowplug relay, it's a 7 prong relay, on a 2002 vw beetle 1.9 diesel no turbo ? allready been under the dash and checked all the relays, none of which are 7 prong,...


Above the Relay Panel is the Auxiliary Relay Panel. Has thirteen positions in it.
6 across the top, 7 across the bottom.

Across the bottom the Glow Plug Relay is the fourth one over from the left. It is Number 10.
(180)

Sep 17, 2009 | 2002 Volkswagen Beetle Turbo S

1 Answer

Trouble code indicates all four glow plug on the left side bad


The garage should be able to test the glow plugs without removing them. All the need to do is use an ammeter or amp clamp and measure the current drawn by the glow plugs. the glow plugs should draw 16 - 20 amps each. much less than that and they want replacing.

Nov 09, 2017 | 2000 Ford Excursion

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