New 5.0l no start

[Atanasd84]

put a new 5.0l long block in a 88 bronco. I'm having hard time starting engine. I have set initial timing to 10BTDC BY THE BOOK.
New distributor. Wires. Plug . Wires are going in correct plug and distributor is installed correctly.
I have several issue.
1. Engine does start but runs on 4 cylinders. Bank 1 is not firing at all and fouling plugs with fuel. Only bank 2 is firing.
2.
With KOEO I just noticed when I rotate distributor the fuel pump relay clicks. Then I hear click coming from ignition module on the side of distributor.
I just installed new PCM and Fuel relays. Still relay clicks when I rotate distributor.
Thank you in advance.

 

[Tiha]

Interesting, That would make me think there is a broken wire in that harness someplace. Turning the distributor makes and breaks the connection.

I would verify the "non firirng" bank does or does not have spark with a spark tester.
If it has spark then move on to compression test or injector testing.
and of course check your firing order again. Then again, and 2 more times after that.

 

[miesk5]

Yo Atanasd84,
Welcome!
The injector is normally closed. It is operated by 12V VPWR from the EEC-IV Power Relay and the ground signal is controlled by the Powertrain Control Module (PCM).

See this EEC IV Connector Pin LEGEND by Fireguy 50 (Ryan M) each bank injector pin#





Inspect EEC connector for corrosion damage at pin 58 and/or pin59.


/or pin 59 of the EEC.

Btw, according to Ford, the EEC case is grounded through Pin 20. Check it as well pins 40& 60


Try a Self Test for Diagnostic Trouble Codes (DTC)s by my pal, BroncoJoe19 @ Code Reader
EEC AKA PCM, computer stores the Self-Test program in permanent memory. When activated, Self-Test checks the EEC system by testing memory integrity and processing capability, and verifies that various sensors and actuators are connected and operating properly.
The EEC will tell you what it found out by testing your sensors, and also any stored information it saved from anything that went wrong during the last 40 trips.
The engine temperature must be greater than 50° F for the Key On Engine Off (KOEO) Self-Test and greater than 180° F for the Key On Engine Running (KOER) Self-Test. Run it around to heat the engine up and shift thru all gears including Reverse. Make sure A/C is off and transmission is in Park (automatic); or in Neutral for a Manual & release clutch. Then turn off engine, all accessories/lights (close driver's door) , etc.
Do KOEO test First. Post Code(s) here according to KOEO & KOER.
A helper can assist you by counting the codes. Some use their smart phones to record them.
BEWARE OF FAN, BELTS, PULLEYS, HOT HOSES, IGNITION HIGH TENSION WIRES, AND ENGINE COMPONENTS
Or ask local mom and dad parts stores if they will test it for you.
Or purchase a coder reader such as Equus 3145 Innova OBD 1 Code Reader for Ford EEC IV Engines at Walmart & most parts stores.
●
Here's the 1988 Ford Bronco & Truck Electrical and Vacuum Troubleshooting Manual (Ford), Emissions Maual & Service Manual by Larry J via member Kingfish999 in Google Drive @ 1988 Ford Truck Service Manuals (Thank you Larry Jorgensen) - Google Drive
View attachment 186108
The Blank one on left is not downloadable and EVTM is Blank one on right side.

1988 Bronco Dealer Brochure @ https://www.broncocorral.com/resources/1988_ford_bronco_brochure.pdf

Haynes Red Manual for 80-95 Bronco & F Series @ Hanes guide 80-96 bko f series.pdf by BroncMom
Al

 

[paul rondelli]

Don't take this the wrong way. The only reason I'm bringing it up is that I made this mistake when I replaced the distributor in my 5.0. Are you absolutely sure you are on the compression strooke when lining up the rotor on the number one cylinder? I made the mistake of thinking I was at TDC on the compression strooke ... but was actually TDC of the exhaust ******. This will put you 180 degrees out of timing and result in hard start and miss fires.

The compression strooke will push more volume out of the plug hole than the exhaust strooke. But both bring the cylinder to the top ... the only difference is that at compression the exhaust ports are closed and at exhaust they are open ... this will result it less pressure out of the plug hole at exhaust stroooke.


Really miesk???? is stroooke such a bad word it needs to be ******

 

[miesk5]

Don't take this the wrong way. The only reason I'm bringing it up is that I made this mistake when I replaced the distributor in my 5.0. Are you absolutely sure you are on the compression ****** when lining up the rotor on the number one cylinder? I made the mistake of thinking I was at TDC on the compression ****** ... but was actually TDC of the exhaust ******. This will put you 180 degrees out of timing and result in hard start and miss fires.

The compression ****** will push more volume out of the plug hole than the exhaust ******.


Really miesk???? is stroooke such a bad word it needs to be ******

Yo Paul,
Word checker was installed by site owner and it sucks. Asked him delete it. it.

 

[johnnyreb]

Don't take this the wrong way. The only reason I'm bringing it up is that I made this mistake when I replaced the distributor in my 5.0. Are you absolutely sure you are on the compression strooke when lining up the rotor on the number one cylinder? I made the mistake of thinking I was at TDC on the compression strooke ... but was actually TDC of the exhaust ******. This will put you 180 degrees out of timing and result in hard start and miss fires.

The compression strooke will push more volume out of the plug hole than the exhaust strooke. But both bring the cylinder to the top ... the only difference is that at compression the exhaust ports are closed and at exhaust they are open ... this will result it less pressure out of the plug hole at exhaust stroooke.


Really miesk???? is stroooke such a bad word it needs to be ******

Thanks for telling us Paul .You got yours straightened out.

 

[Blueblooded]

put a new 5.0l long block in a 88 bronco. I'm having hard time starting engine. I have set initial timing to 10BTDC BY THE BOOK.
New distributor. Wires. Plug . Wires are going in correct plug and distributor is installed correctly.
I have several issue.
1. Engine does start but runs on 4 cylinders. Bank 1 is not firing at all and fouling plugs with fuel. Only bank 2 is firing.
2.
With KOEO I just noticed when I rotate distributor the fuel pump relay clicks. Then I hear click coming from ignition module on the side of distributor.
I just installed new PCM and Fuel relays. Still relay clicks when I rotate distributor.
Thank you in advance.

i would pull out the distributor and reinstall making sur you are a compression ****** with #1 cylinder all the way up and rotor should be aligned with the #1 on the distributor cap. Also check the roll pin on the distributor gear to make sure it is not broken punch it out and check if is not broken just tap back into place. I have had these shear and spent alot of money trying to figure out for a 25 cent roll pin

 

[blksn8k]

i would pull out the distributor and reinstall making sur you are a compression ****** with #1 cylinder all the way up and rotor should be aligned with the #1 on the distributor cap. Also check the roll pin on the distributor gear to make sure it is not broken punch it out and check if is not broken just tap back into place. I have had these shear and spent alot of money trying to figure out for a 25 cent roll pin

Just to add to your comment about the roll pin, if it is sheared off then I would also check to make sure that the oil pump has not seized because that can be why the pin sheared in the first place. Been there, done that.

 

[GunnySutton]

put a new 5.0l long block in a 88 bronco. I'm having hard time starting engine. I have set initial timing to 10BTDC BY THE BOOK.
New distributor. Wires. Plug . Wires are going in correct plug and distributor is installed correctly.
I have several issue.
1. Engine does start but runs on 4 cylinders. Bank 1 is not firing at all and fouling plugs with fuel. Only bank 2 is firing.
2.
With KOEO I just noticed when I rotate distributor the fuel pump relay clicks. Then I hear click coming from ignition module on the side of distributor.
I just installed new PCM and Fuel relays. Still relay clicks when I rotate distributor.
Thank you in advance.

Just asking. Is this flat tappet or roller heads on this long block? I have a roller block with flat tappet heads and cam. Firing order was different for a roller block with roller heads. I have a 90 Bronco 5.0 EFI.

 

[johnnyreb]

Just asking. Is this flat tappet or roller heads on this long block? I have a roller block with flat tappet heads and cam. Firing order was different for a roller block with roller heads. I have a 90 Bronco 5.0 EFI.

A mistake the engine build could have done .Was to put the WRONG head gasket on the motor. We did it once on my dad,s InternatioalL. The parts man THOUGHT we were working on a 4 cylinder. Check the compression on both sides.

 

[johnnyreb]

put a new 5.0l long block in a 88 bronco. I'm having hard time starting engine. I have set initial timing to 10BTDC BY THE BOOK.
New distributor. Wires. Plug . Wires are going in correct plug and distributor is installed correctly.
I have several issue.
1. Engine does start but runs on 4 cylinders. Bank 1 is not firing at all and fouling plugs with fuel. Only bank 2 is firing.
2.
With KOEO I just noticed when I rotate distributor the fuel pump relay clicks. Then I hear click coming from ignition module on the side of distributor.
I just installed new PCM and Fuel relays. Still relay clicks when I rotate distributor.
Thank you in advance.

Happened to us. The parts man sold us the wrong head gasket. The wire were firing ,but the plugs weren,t. Hopefully you still have the gasket wrapping to compare the numbers on it. They fired (plugs)on one side and the other side would not. It wasn,t getting compression. Check the compression to make sure also. Good luck.

 

[L\Bronco]

Just asking. Is this flat tappet or roller heads on this long block? I have a roller block with flat tappet heads and cam. Firing order was different for a roller block with roller heads. I have a 90 Bronco 5.0 EFI.

I know this thread is a bit old, but I need to throw my hat in the ring. Ford changed the 5.o firing order from 15426378 to 13726548 in the late 80's. There are many explanations for this out there. Regardless, I have run into engine builders using the old firing order cam in the newer engines and vice versa (if they are flat tappet.)
If you feel you have it timed correctly, then simply switch number 3-5 and 4-7 plug wires at the cap and see if that fixes it, (if you haven't already done so)
Good luck
Cheers

 

[Motech]

With KOEO I just noticed when I rotate distributor the fuel pump relay clicks. Then I hear click coming from ignition module on the side of distributor.
I just installed new PCM and Fuel relays. Still relay clicks when I rotate distributor.
Thank you in advance.

Don't dwell on that, it's normal. KOEO, computer sees PIP input (distributor rotation) as engine turning over. Your results are normal, and verify a bunch of good stuff, like:

• PIP Sensor good
• PCM good to fire fuel pump relay
• PCM good to trigger ICM
• ICM good to fire coil
• Coil firing