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Old 02-14-2012, 09:51 AM   #106
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Ive read that some people are drilling out the rivets, any reason I would need to do that?
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Old 02-14-2012, 04:15 PM   #107
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Re: 91 5.0 Mostly Stock

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Ive read that some people are drilling out the rivets, any reason I would need to do that?
Drilling out what rivets?
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Old 02-14-2012, 04:23 PM   #108
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The ones that hd the gasket layers together. I researched more and that was with a particular type of aftermarket head though. My engine is all stock.

Should I lube the cylinders/pistons with something. It all looks so dry since I have the heads off?
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Old 02-14-2012, 04:28 PM   #109
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Re: 91 5.0 Mostly Stock

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The ones that hd the gasket layers together. I researched more and that was with a particular type of aftermarket head though. My engine is all stock.

Should I lube the cylinders/pistons with something. It all looks so dry since I have the heads off?
No, I would not drill out the rivets in your case.


Make sure the cylinders are really clean and squirt a bit of engine oil in there right before you close it up. That'll help lube it during the initial start up.
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Old 02-14-2012, 04:29 PM   #110
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Cool, thanks!
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Old 02-20-2012, 09:15 PM   #111
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Turbo system installed!!! Can't start the car though because I can't figure out where to plug in this computer chip. I pulled the A9L down on the passenger side, does the chi go inside there? Help?
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Old 02-20-2012, 09:32 PM   #112
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Re: 91 5.0 Mostly Stock

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Turbo system installed!!! Can't start the car though because I can't figure out where to plug in this computer chip. I pulled the A9L down on the passenger side, does the chi go inside there? Help?
You should have gotten instructions with it on how to install it.


They go into the port on the rear of the computer, but there is a procedure you need to follow to install it so it makes good contact and you do not short anything out and ruin your computer.
Check their website to see if they have the instructions or try searching for another brand of chip for install instructions, they should all be similar.
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Old 02-20-2012, 09:56 PM   #113
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Okay, thanks. It either didn't come with instructions or they were lost in the shuffle.
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Old 02-21-2012, 05:51 PM   #114
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So is there a trick to getting the car started after taking the engine apart to replace head gaskets?
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Old 02-21-2012, 08:24 PM   #115
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Cannot figure this out. She runs for about five seconds and then dies.
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Old 02-21-2012, 08:40 PM   #116
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Might want check ur timing
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Old 02-21-2012, 08:47 PM   #117
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Might want check ur timing
i agree
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Old 02-21-2012, 09:43 PM   #118
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Will do, how do I know what the best timing setting is for my car?
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Old 02-21-2012, 09:48 PM   #119
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10* is stock.most people can get up to 14* but may have to use 93 octane fuel.i am shooting to run 17* on mine with my trickflow heads.this is base timing.be sure to unplug your spout connector when setting timing. the old school way to set timing is to slowly advance it in 2* increments until u get detonation and them back it off 2*. i believe in the sticky thread useful mustang info thread there is a article on setting timing.
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Old 02-21-2012, 09:51 PM   #120
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Cool, thanks!
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Old 02-21-2012, 09:56 PM   #121
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no problem
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Old 02-21-2012, 11:26 PM   #122
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Re: 91 5.0 Mostly Stock

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Will do, how do I know what the best timing setting is for my car?
If you are using a chip, it may be based off of stock timing, so I would set it at 10 degrees BTDC.
You can ask your chip manufacturer to be sure.
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Old 02-22-2012, 07:31 AM   #123
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Okay, thanks, I am using a chip.
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Old 02-22-2012, 05:42 PM   #124
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Have spark, have gas in the lines, hear the fuel pump prime for a few seconds when I turn the key but cannot get this sucker to run.

---------- Post added at 05:42 PM ---------- Previous post was at 05:19 PM ----------

Anyone near Elgin IL? I need help, Willing to pay. Going crazy here.
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Old 02-22-2012, 06:04 PM   #125
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did u check you timing?even though u have fuel did you check your fuel pressure? you need to make sure your injectors are firing to.you can check those with a noid light.you can also check the pip in the distributor.then i would check to make sure your computer has power and is grounded properly. did you try giving it a shot of ether?
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Old 02-22-2012, 06:34 PM   #126
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I'll try some more things I guess. I did not try the ether. It's weird cuz It runs for a couple of seconds and then stops. I did install a bigger fuel pump but I can hear it turn on for a few seconds when I turn the key.

---------- Post added at 06:34 PM ---------- Previous post was at 06:34 PM ----------

Also, it only starts every fifteenth try.
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Old 02-22-2012, 06:42 PM   #127
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i think u might want to try try hooking a fuel pressure gauge and watch what it does during this.
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Old 02-22-2012, 06:43 PM   #128
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Okay
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Old 02-22-2012, 11:41 PM   #129
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Re: 91 5.0 Mostly Stock

I've heard from having 42 pound injectors or larger that it was sometimes extremely hard to start...
but thats just something i've heard
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Old 02-23-2012, 06:14 AM   #130
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Okay, I do have 42's.
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Old 02-23-2012, 07:26 AM   #131
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Re: 91 5.0 Mostly Stock

Air/Fuel/Fire

Verify that you have those three things and it should start.


1. Air - Unobstructed air intake path.


2. Fuel - Make sure you have the proper fuel pressure and the injectors are operating.


3. Fire - Make sure your timing is correct and your battery is fully charged, also verify that any aftermarket ignition systems are functioning and wired properly.


Larger injectors can cause starting problems, but the chip they sent you should be programmed to cover that I would think.
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Old 02-23-2012, 08:16 AM   #132
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I am going to take today off fro
this stuff and resume tomorrow. I'll start over with all the troubleshooting steps from the stickie thread and you guys. I did install a new fuel pump, is there really anything I could've done wrong with that? It was only two wires.
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Old 02-23-2012, 08:19 AM   #133
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Re: 91 5.0 Mostly Stock

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I am going to take today off fro
this stuff and resume tomorrow. I'll start over with all the troubleshooting steps from the stickie thread and you guys. I did install a new fuel pump, is there really anything I could've done wrong with that? It was only two wires.
No, I don't think there is much you could do wrong with the pump, just do a pressure check to make sure it is working properly.
Did you replace the fuel filter while you were at it?
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Old 02-23-2012, 08:20 AM   #134
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No, but I bought one yesterday to try that.
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Old 02-23-2012, 09:15 AM   #135
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Have you tried resetting the ecu? Unplug the negative terminal, depress brake pedal for 15-20 seconds (brake light should not be lit up at all), put negative terminal back in and start it up. Worth a shot? Other wise make sure you're getting fuel, spark, and air like trojan said. Make sure you dont have a massive vacuum leak somewhere, and make sure your maf is in the right way
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Old 02-24-2012, 05:34 AM   #136
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So the fuel line that goes to the regulator has fuel but the return (lower line) is dry. Does that mean the regulator is bad? If so what regulator do you guys prefer?
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Old 02-24-2012, 07:56 AM   #137
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Re: 91 5.0 Mostly Stock

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So the fuel line that goes to the regulator has fuel but the return (lower line) is dry. Does that mean the regulator is bad? If so what regulator do you guys prefer?
It's not bypassing any fuel, what's your pressure?
I like the Kirban regulators, look good and they are easily rebuildable.
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Old 02-24-2012, 08:25 AM   #138
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Would the smog and charcoal box vacuums cause this if they are not properly plugged?
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Old 02-24-2012, 11:02 AM   #139
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Re: 91 5.0 Mostly Stock

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Would the smog and charcoal box vacuums cause this if they are not properly plugged?
No, I don't think they could cause that issue.
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Old 02-24-2012, 11:22 AM   #140
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Okay, so probably Fuel pressure regulator then.

---------- Post added at 11:22 AM ---------- Previous post was at 11:06 AM ----------

There seems to be a segregate sort of box in the fuel tank when I look in to it. The fuel pump needs to sit in there right?
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