Tune Up Problem
#1
Posted 12 June 2004 - 11:49 AM
I have a problem I got stuff for a tune up today changed the plugs wires and cap and rotor botton. I also replaced pvc valve and oil. I have a 89 bronco with 302 5.0L efi. I took all the stuff off and started replacing then i set the firing order as per the haynes manual for 94 and earlier. I made sure everything connected correctly. Then I try to start and nothing it just back fires. So i am like okay Ill try the 95 and later firing order as per the haynes manual and it starts but sounds like it is missing really bad. I have rechecked the gap on the plugs and have checked everything I know to check. I was wondering if it could have a different timing order then the haynes manual. Please help me I am wanting to get this done.
#2
Posted 12 June 2004 - 11:59 AM
I did a search and found the above info on another site.
I don't know if Ford used the HO302 in the Broncos or not but it might be worth a try.
Police Package
351W
E4OD
31" Tires
Going through a complete restore
http://fullsizebronc...ail.php?id=1650
#3
Posted 12 June 2004 - 12:18 PM
#4
Posted 12 June 2004 - 12:28 PM
Police Package
351W
E4OD
31" Tires
Going through a complete restore
http://fullsizebronc...ail.php?id=1650
#6
Posted 12 June 2004 - 01:27 PM
#7
Posted 12 June 2004 - 02:54 PM
#8
Posted 12 June 2004 - 07:39 PM
It is not recommended that you do this intentially, but if you get shocked by your wires...they are cheap, or defective. Also you should hear a "click" when they are seated properly. Check one more time that the #1 wire is on the #1 cap position, and they are installed in a COUNTER CLOCKWISE direction.
Check to make sure you didn't knock any vaccume hoses, or electrical connectors loose. The TPS connector is right in the way of routing your left bank wires, and if it's loose or disco'ed the engine will run like crap.
SHADOW_D has you covered on the firing orders. Are you sure it's a 5.0, because it shouldn't start at all with the 5.8 firing order, unless it's a HO.
351W HO EFI
3 Speed Auto
#9
Posted 13 June 2004 - 05:22 AM
#10
Posted 13 June 2004 - 09:21 AM
#11 Guest_BigNasty_*
Posted 13 June 2004 - 09:55 AM
The engine can run just fine like that, just starting at the new location for #1 and wiring it in the order that you used the first time.
Use a sharpie to mark the new #1 location on the distributor cap for future reference
As I said, it should run absolutely fine like this as long as the distributor isn't off enough to make setting the timing impossible.
If thats the case, get a new gasket or O ring(if needed) and yank the dist. after getting #1 on top dead center of the compression stroke and reset it so the button points the right way (with the #1 on the cap)
About the wires.. The angle boots on the distributor side of the wires can give you a hard time also, popping out or off when the contact isn't snapped in properly.
My trick on this problem is to put a drop or two of saliva (gotta spit anyways ) on the wire where it enters the boot, then pushing the wire out of the boot about 2".
I then spread the gap on the terminal making it about a 16th of an inch wider.
Snap the terminal into the cap, then slowly work the boot into place.
(Ford has two types of caps, the above is for the older caps with internal connections for the plug wires)
Until I started spreading the gap and installing wires in that fashion, I was always plagued by mystery misses and back fire issues when the terminals lost contact.
You shouldn't have that issue with the externally terminaled caps, but I always squeeze the wire terminals a little tighter to make sure
#12
Posted 13 June 2004 - 10:53 AM
#13
Posted 13 June 2004 - 06:31 PM
Does your truck use the big spark plug, or the small? If it uses the big plug someone may have put a set of old 351W(pre'74) heads on your engine. These heads breath alot better than stock 302 heads, and are a popular swap, since they come pretty cheap. If you can see the casting # on the head, the 1st letter is the decade C='60's, D='70's, etc. The # after the letter is the year, C9OE=1969.
Also if you firing order is for a 351W, they installed a 351W cam. I don't remember which order you finally used.
351W HO EFI
3 Speed Auto
#14
Posted 14 June 2004 - 04:14 AM
#15
Posted 14 June 2004 - 04:12 PM
If for some reason you decide to sell the truck sell it to an ex-girlfriend or an enemy but take all the markings off so you can get some revenge LOL J/K
Police Package
351W
E4OD
31" Tires
Going through a complete restore
http://fullsizebronc...ail.php?id=1650
#16
Posted 14 June 2004 - 04:57 PM
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