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Old 03-22-2010, 07:39 PM   #1
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Ford 5.8 engine help (1995)-tune up problem

I've got a new issue.

I got the van back from the shop this afternoon and it runs fine at idle but stutters badly going up an incline or when trying to accelerate. The mechanic said it was the transmission going out. I'm pretty certain that is not correct. This is definitely a brand new issue after the tune up. They closed right after I picked it up so I have not discussed further with them

The following work was done:

-new plugs (properly gapped and torqued by me)
-new wires, rotor, and distributor cap
-The distributor was pulled and put back in (the shop put it back in).
-new front 02 sensor (just because-it was working fine)
-new thermostat
-new heater core, coolant, hoses
-new belt
-new alternator

I can only see three possibilities. Either I got the wrong 02 sensor, the timing isn't set right, or the computer needs to be reset. I tried disconnecting the battery (starting battery only) to reset but it didn't help.

I can try sticking the old 02 sensor back in and see if that helps.

Any advice before I take it back in would be appreciated.

Tom


Thanks again to everyone on the broken bolt problem:

viewtopic.php?f=2&t=4488
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Old 03-22-2010, 07:56 PM   #2
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Re: Ford 5.8 engine help (1995)-tune up problem

Were the plug wires put on the correct order?

That's exactly how my 5.8L acted when I screwed up the order. Idled fun, but ran rough under load.
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Old 03-22-2010, 08:03 PM   #3
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Re: Ford 5.8 engine help (1995)-tune up problem

Did you try it in different gears? Trany fluid looks good (full and not burnt) Yeah it don't really sound like a the trany if it shutters. Maybe a plug wire not fully on, a fouled new plug or plug wire grounding out? Just some simple things to check.
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Old 03-22-2010, 09:29 PM   #4
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Re: Ford 5.8 engine help (1995)-tune up problem

Thanks. I triple checked the order of the new wires and labeled them on tape at both ends. They removed all the tape so that may have to be rechecked.

I'm going to give them another shot at it but it's good to know it doesn't sound like the tranny to others. I'll try it in different gears tomorrow.

Tom
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Old 03-25-2010, 06:20 PM   #5
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Re: Ford 5.8 engine help (1995)-tune up problem

Is this shop familiar with older Fords? My first thought is that they did not remove the spout connector when setting the timing, which means it is not set correctly. The spout connector is a small plug off the main wiring harness over near the driver's side firewall. When it is removed, the computer does not advance the timing, which is the only way to get it set correctly. IIRC, timing should be 10 BTDC.

Motorcraft electrical parts are definitely recommended, especially with the plug wires. Cross-firing is also an issue if the plug wires run for any length touching one another. It is good to make sure that they cross at 90 when needed, but try to keep them properly separated and secured.

O2 sensor issues seem unlikely, though low voltage could cause the problem that you described. I would put a volt meter on the battery and rev it up, just to make sure that there is not a problem with alternator output (bad alternator, loose wire, etc).

HTH,
Dave
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Old 03-25-2010, 08:10 PM   #6
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Re: Ford 5.8 engine help (1995)-tune up problem

Thanks everyone. They fixed it. The thing would barely drive the two blocks from my house to the shop. The ticket says "timing a little off. but transmission may still be slipping." Maybeee....

Should have read "timing way off." But it's fixed and on the road again. I felt pretty bad about all the money I didn't save by having the garage do the work so I had to go price an aluminess bumper so I could feel better.

I dropped it off this morning to have the doors repainted as the mechanic shop scratched them both on the lift (5 week old paint job). The foreman said, "there's almost no way we could have done that." Then we walked out to the bay together and there was white paint on both sides of the lift. Right where the foam covering was gone.

Next project may be a bullet proof transmission rebuild. But that's another day.

Thanks again.

Tom
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Old 03-25-2010, 08:44 PM   #7
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Re: Ford 5.8 engine help (1995)-tune up problem

Man, how crappy is that! Is the shop springing for the paint?
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Old 03-26-2010, 05:34 AM   #8
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Re: Ford 5.8 engine help (1995)-tune up problem

Quote:
Originally Posted by saline
Man, how crappy is that! Is the shop springing for the paint?

Yes, they are taking responsibility. so I can't complain too much. They are doing the right thing. I'd give them a B- on the whole experience which isn't so bad when dealing with a garage. Especially when I took them a partially disassembled engine and said "help, I'm in over my head." They could have easily told me that the intake manifold had to be replaced. $$$

It's all good.
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