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  #31  
Old 12-11-2014, 04:55 AM
Prages Prages is offline
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Default Re: 98 ranger sohc won't run

I still say if those are accurate compression numbers, you're looking at a mechanical problem, not a sensor or computer. Electronics don't have any bearing on compression.
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  #32  
Old 12-11-2014, 08:40 AM
derekq34 derekq34 is offline
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Default Re: 98 ranger sohc won't run

After we did the heads and a valve job and put it back together it still did the same thing. Heads were cracked. So we tore the bottom apart. Rings check out fine. Mechanically it is perfect.

----------

Its in time. It didn't jump. Cam is fine
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  #33  
Old 12-11-2014, 08:46 AM
djfllmn djfllmn is offline
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It's not because you have such low compression
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  #34  
Old 12-11-2014, 10:09 AM
derekq34 derekq34 is offline
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Default Re: 98 ranger sohc won't run

Everything has been checked in the engine
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  #35  
Old 12-11-2014, 10:13 AM
djfllmn djfllmn is offline
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It's not electronic. That's a bet Leak down test time

In fords eyes anything under 100psi of compression is a fail
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Last edited by djfllmn; 12-11-2014 at 10:16 AM.
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  #36  
Old 12-11-2014, 10:41 AM
smokinAMD smokinAMD is offline
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Default Re: 98 ranger sohc won't run

This engine needs to go to a machine shop if you want it to work properly. Needs to be honed at the minimum, possibly bored and honed, possibly new oversized pistons. Camshaft needs to be measured for excessive wear, block needs to be decked, heads probably need to be resurfaced, needs a new timing chain, etc.

Clearly whoever is working on this doesn't know the fundamentals of rebuilding an engine properly.
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  #37  
Old 12-11-2014, 10:50 AM
97rangerstepside 97rangerstepside is offline
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Default Re: 98 ranger sohc won't run

Quote:
Originally Posted by djfllmn View Post
It's not electronic. That's a bet Leak down test time

In fords eyes anything under 100psi of compression is a fail
Quote:
Originally Posted by smokinAMD View Post
This engine needs to go to a machine shop if you want it to work properly. Needs to be honed at the minimum, possibly bored and honed, possibly new oversized pistons. Camshaft needs to be measured for excessive wear, block needs to be decked, heads probably need to be resurfaced, needs a new timing chain, etc.

Clearly whoever is working on this doesn't know the fundamentals of rebuilding an engine properly.
^^^ all of this.
Your engine will most likely have to come out and come back apart and be rebuilt. Low compression cannot be fixed without the engine coming apart.
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  #38  
Old 12-11-2014, 10:59 AM
Fordzilla80 Fordzilla80 is offline
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Default Re: 98 ranger sohc won't run

Since you obviously know everything is alright, why won't the truck start?
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  #39  
Old 12-11-2014, 11:48 AM
dirtbike5100 dirtbike5100 is offline
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Default Re: 98 ranger 4.0 OHV won't run

Needs a new compression tester
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  #40  
Old 12-11-2014, 11:53 AM
smokinAMD smokinAMD is offline
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Default Re: 98 ranger sohc won't run

Whose to say he even did the compression test right. He never specified if it was a running compression reading, a wet compression test, or a dry compression test. The numbers WILL be different on all 3.
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  #41  
Old 12-11-2014, 12:00 PM
derekq34 derekq34 is offline
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Default Re: 98 ranger sohc won't run

Already been tore apart. Its at my brothers shop. Weve taken it apart multiple time, there is nothing wrong with the engine itself. Poured transmission fluid in each cylinder, Didn't leak down over night, not a drop. Its being worked on by professionals. You know, those people that do this everyday and not sit on the computer and act like they know everything. This was a complete waste of time. The engine has been torn apart 3 times, there is nothing wrong with it. Arguing with me about what's been done gets me nowhere, used 2 different compression gauges. Both say the same damn thing.
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  #42  
Old 12-11-2014, 12:13 PM
smokinAMD smokinAMD is offline
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Default Re: 98 ranger sohc won't run

Not arguing. It's just been pointed out on MULTIPLE occasions that the only thing that will cause a low compression reading on a properly conducted test, with a properly functioning compression gauge is in fact, a MECHANICAL problem with the engine. Not electrical, not fuel delivery, an internal mechanical problem to the engine.

I can say that safely, either you either are not conducting these tests properly, or you guys don't understand the fundamentals of diagnosing low compression or basic engine repair.

I don't know anything though, I just do this for a living.
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  #43  
Old 12-11-2014, 12:13 PM
djfllmn djfllmn is offline
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Quote:
Originally Posted by derekq34 View Post
Already been tore apart. Its at my brothers shop. Weve taken it apart multiple time, there is nothing wrong with the engine itself. Poured transmission fluid in each cylinder, Didn't leak down over night, not a drop. Its being worked on by professionals. You know, those people that do this everyday and not sit on the computer and act like they know everything. This was a complete waste of time. The engine has been torn apart 3 times, there is nothing wrong with it. Arguing with me about what's been done gets me nowhere, used 2 different compression gauges. Both say the same damn thing.
I would question the mechanics who rebuilt it. A fresh 4.0 should be well north of 130.
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  #44  
Old 12-11-2014, 12:15 PM
ranger024x4 ranger024x4 is offline
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Default Re: 98 ranger sohc won't run

did you have even numbers across all 6?
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  #45  
Old 12-11-2014, 12:17 PM
modelageek modelageek is offline
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Default Re: 98 ranger sohc won't run

Quote:
Originally Posted by derekq34 View Post
Already been tore apart. Its at my brothers shop. Weve taken it apart multiple time, there is nothing wrong with the engine itself. Poured transmission fluid in each cylinder, Didn't leak down over night, not a drop. Its being worked on by professionals. You know, those people that do this everyday and not sit on the computer and act like they know everything. This was a complete waste of time. The engine has been torn apart 3 times, there is nothing wrong with it. Arguing with me about what's been done gets me nowhere, used 2 different compression gauges. Both say the same damn thing.
Are these the same professionals that dud not know if they were working on a OHV OR A SOHC?

These pros rebuilt it 3 times and can't get the compression over 100?

These pros should have just dropped in a used motor. They are cheap.

Yawn yawn!
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