97 7.3 diesel starts hard - Page 2 - PlowSite.com™

Milwaukee · #21 10-01-2012, 10:18 PM

Easy way to know you have bad glow plug relay is get big screwdriver and short out on 2 big studs. Hold on it for about 30 seconds then go inside truck try crank.

I replaced those with Boss's biggest relay solenoid it been work good.

If it injectors cheaper is switch to 5w40 shell synth it will work best for while.

dieselss · #22 10-01-2012, 10:40 PM

Ok goes back to...who has shop equipment testers? Lights and heater are a good way to test. 15-20amps only from a carbon tester. Start up amps aren't telling u alt out put if you have low or bad batt,,, a good tech will know without a carbon tester

brad96z28 · #23 10-01-2012, 10:43 PM

Quote:

Originally Posted by Milwaukee

Easy way to know you have bad glow plug relay is get big screwdriver and short out on 2 big studs. Hold on it for about 30 seconds then go inside truck try crank.

I replaced those with Boss's biggest relay solenoid it been work good.

If it injectors cheaper is switch to 5w40 shell synth it will work best for while.

Ive had to do that in a pinch.Thats a great free test with extremely minimal tools.

brad96z28 · #24 10-01-2012, 10:54 PM

I give up .I might as well explain it to the head tech at town fair tire.

dieselss · #25 10-01-2012, 10:58 PM

Well let's just agree to test our own ways and what works best for them is there way and that's fine. Were here to help and that's why there's 10,000 different ways that pple can get the same results

Ziob34 · #26 10-02-2012, 07:15 AM

thanks for the input i'll go through it this week i think they were autolite cheap plugs some are probably burnt out any recommendations for good long lasting plugs....got the truck with them in it truck has 190k on it

brad96z28 · #27 10-02-2012, 07:43 AM

Motocraft/beru only. If it has autolites pray they come out. I have had to take a a few sets of heads off because of people using those.

Ziob34 · #28 10-08-2012, 08:44 AM

can you get them online anywhere decent price pretty sure i just have a few burnt out plugs.

Plow More · #29 10-08-2012, 08:52 AM

Last i knew (couple years ago) autozone carried the good ones at a really good price

brad96z28 · #30 10-08-2012, 10:15 AM

Quote:

Originally Posted by Plow More

Last i knew (couple years ago) autozone carried the good ones at a really good price

Thats correct. The label has some sort of an off brand but looking at the gp its self it should have the beru name on them.

Plowtoy · #31 10-08-2012, 11:02 AM

I don't get it? Why would you replace something that has already been replaced and is not a real fun job to do, but not replace something that hasn't been replaced and are known to fail and only take 10 minutes to do? I still think you have a bad glow plug relay and suspect you will end up replacing that after you change your glow plugs. JUST MY $.02

clark lawn · #32 10-08-2012, 11:59 PM

Quote:

Originally Posted by Plowtoy

I don't get it? Why would you replace something that has already been replaced and is not a real fun job to do, but not replace something that hasn't been replaced and are known to fail and only take 10 minutes to do? I still think you have a bad glow plug relay and suspect you will end up replacing that after you change your glow plugs. JUST MY $.02

Or better yet do some troubleshooting and find what the problem is before you just start changing parts.

It really hasn't gotten cold enough anywhere yet to need the glow plugs in order to get the truck started.

Ziob34 · #33 10-10-2012, 07:54 AM

Quote:

Originally Posted by clark lawn

Or better yet do some troubleshooting and find what the problem is before you just start changing parts.

It really hasn't gotten cold enough anywhere yet to need the glow plugs in order to get the truck started.

need the plugs to aide the diesel combustion......several plugs were burnt out put all new in fires right up....

dieselss · #34 10-10-2012, 08:01 AM

Good deal its fixed and that's all that matters

Ziob34 · #35 10-11-2012, 07:50 AM

by the way if anyone needs plugs advancedauto has them online motocraft zd11's reasonably priced at a little over 10 bucks a peice with coupon.

going to buy a glow plug relay later this week to keep on hand just in case....any brand recomendations or ones to stay away from? thanks for the help

FordFisherman · #36 10-11-2012, 08:04 PM

Use a Fisher or Western plow relay they last longer than that Napa junk.

brad96z28 · #37 10-11-2012, 09:53 PM

never ever had a problem with motorcraft.

clark lawn · #38 10-12-2012, 11:52 AM

Like I said already. You more than likely have another issue going on. You don't need glow plugs to get a 7.3 started, or any diesel for that point, until it is below 50 degrees. New plugs may have helped but they didn't fix it.

Ziob34 · #39 10-14-2012, 08:46 AM

its been below 50 degrees in the mornings for a while now.......new plugs fixed the problem easy starts since.........

on another note anyone ever had a glow plug relay only draw about half of what its supposed to? friends truck plugs all test fine but relay has 12v at the battery post but only draws 6v when you turn the key on instead of the normal 12.

brad96z28 · #40 10-14-2012, 11:13 AM

I dont ck them that way but sounds about rite, if you did not have any glow plugs working you would have 12 volts. Turn on the key and you got about a 200 amp draw there is your voltage drop. But I ck these with an amp meter to know exactly what its doing.Cking voltage does not tell you a whole lot.