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Discussion Starter #1
hey guys,

So I'm doing a 351W swap in my '90 Bronco and I have a few questions. there is a vacuum line coming off the passenger side, from inside the cabin. It has a T crosspiece, with one end coming from the cabin, and then 2 branches with rubber boots for connecting. I do not know where they go though. I believe one goes to the tree coming out of the upper intake manifold, but not too sure.

Next is the PCV valve. There are 2 small openings for connections, or what I would believe to be. What, if anything, connects to that?

After that we move to the lower intake manifold. On the drivers side of manifold, there is an opening that is at an angle and facing outwards. I am not talking about the fuel rail mounts. I don't know if something goes in there, or if it's just a threaded space.

Lastly, there is the coil bracket and mount. This is located on the driver's side and AS OF NOW, is bolted to a bracket coming off the exhaust manifold which I know is correct, a stud coming up from the intake manifold to the rear mounting hole, and is not mounted to anything towards the front hole. Is there another stud that comes up that it mounts to? Or does that opening I asked about above come into play somewhere over there?

Any help would be greatly appreciated. This engine swap has been going on for a year now, seeing as I have college during the week, and ship out during the summer. I have trouble remembering where every part goes now haha. Thanks a lot guys, and if pictures will help my descriptions, just let me know and I'll post them.
 

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yo,
I know Seattle will get you on track once he sees the pics!

for Now;
Electrical & Vacuum Troubleshooting Manual (EVTM) for an 86 (Partial); Speed Control on pages 135-139, A/C & Heater on pages 140-145, Radio on pages 127-129
Source: by Chris B (Blue, bronco boy)

see page 141 for the HVAC vacuum ckt diagram http://chrisb.users.superford.org/Bronco/Misc/1986_EVTSM_Page_141.jpg
this is by Steve83
"...Typical EFI Vacuum Lines (V8 shown; I6 similar)
For colored hard plastic vacuum lines:
RED is the Ford standard color for manifold vacuum
BLACK is the Ford standard color for checked or reservoir vacuum
PINK is the Ford standard color for TAB
YELLOW is the Ford standard color for TAD
GREEN is the Ford standard color for EGR
WHITE is the Ford standard color for the fresh/recirc (this is the Outside Recirculate Door) door for the HVAC system
Early 2-port HVAC check valve shown. Most trucks use a 3-port check valve that connects to the HVAC reservoir..."


Outside Recirculate Door Vacuum Motor pic in a 90; Shiny piece in upper left
Source: by Seattle FSB (SeattleFSB) at SuperMotors.net


Vacuum Tree Location pic in a 90 5.8; "VRESER, HVAC, FPR, Brake Booster, (+ my 1990 has one to the Vacuum Cruise Control & Cruise Reservoir; You will not see the Brake Booster vacuum Line on my Bronco as I have Electric Boost Brakes. The remaining ports are capped. Remember, some lines are main intake manifold vacuum lines and some are secondary vacuum from actuators."

Source: by Seattle FSB (SeattleFSB) at SuperMotors.net

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PCV valve.
Info & pic, 1 port vs. 2 port for 5.0; "...That's a genuine Ford PCV valve. It's stock two port top (top of pic); makes it difficult to fit under the upper intake on an EFI 5.0 engine. Buy an aftermarket single port (lower in pic) and use the top on the Ford PCV..."

miesk5 Note, often the rubber cap on the top port pops off
Source: by Sixlitre (Malcolm H, Eddie Bauer) at http://www.supermotors.net/registry/4970/19321


lower intake manifold & coil bracket and mount. see this diagram to help id location


also Sewiv has coil mount pics at http://fullsizebronco.com/forum/showthread.php?t=63592

as well as
Installation, Accel pics in a 90
Source: by Supersanbob (Super Bronco) at http://www.supermotors.net/registry/media/646376
some pics for example

 

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1. The vacum lines coming out of the cab control the hvac system. One connects to the flapper valve that controls airflow to floor, vents, defrost. There is also a line that needs to get a vacum source, so it would go to the vacumn tree.

2. On the PCV valve, the small hole on the valve is capped off and the larger connection on the valve goes to the PCV connections on the upper intake.

3. On the coil bracket, there is one connection to the intake bolt and the other two holes in the brackets connection to the raised studs that also serve to attached the low intake ot the heads. These studs are known to rust off and break.

4. The hole in the lower intake path is most likely for the act sensor. That is typically reloacted to the air box in a MAF setup.
 

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Discussion Starter #5
sorry for the lapse in time. college put the engine on a back burner for a while. got some time to crank her over and shes not running right. i used an engine diagnostic tester and got some outputs that signify a problem. these are the problems i get:

12: system cannot raise engine speed above normal idle.
22: MAP sensor or barometric pressure (BP) sensor not at normal vacuum levels.
13: RPM out of specification during normal idle operation OR D.C. motor does not follow dashpot
77: operation error during Dynamic Response portion of Engine Run Self-Test.
74: Brake On/Off (BOO) switch action not detected during Dynamic response portion of Engine Run Self-Test.
65: Electrical charging system problem occurred - voltage too high (over 17.5 Volts) OR Engine control system never went into closed loop fuel operation OR transaxle problem - Overdrive Cancel Switch (OCS) was not cycled during engine run self-test.

if anyone has any input on this i'd appreciate the help. I also took pictures of the previous problems (the whole in lower intake manifold and the lonely vacuum hose). In addition i took a video of the engine running, with RPM and timing narations.


this is the vacuum line i cant figure out where the end with the plug in it goes.


this is the whole that i dont know if a sensor goes in. it is between the 2nd and 3rd fuel injector on the manifold in reference to the picture on the drivers side.

here is the video
http://s172.photobucket.com/albums/w27/one800usukkk/Bronco/?action=view&current=DSCN2090.mp4

this what i got for now guys. anything else to try and help me and i'll do my best to provide. thanks a lot
 

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Well, I can comment on the last 3 issues.
During the KOER test you need to perform some actions. Dynamic response is stepping on the gas and brake pedal depressed. You also have to manually cycle the od cancel switch. If you do not do those things, you will come up with an error.

If you did those things and have these errors, thats a different matter entirely.

As for the PCV valve, since you are already working in that area, it would be a good idea to re-route the lines to it, as listed Here.
 

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in your picture holding the vacuum line. that line goes onto the air box just behind that piece of tape that says MAP. or just under it. hard to tell how far back the tape is.

the hole in the lower intake isn't for anything. nothing goes in there and it doesn't lead to anything.

 

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when you did the KOER test did you do what it said to to? the turn the wheel. push the brake portions. followed by the blip the throttle portion?

some of those codes make it seem like those tests weren't performed. Most of the other ones sound like a vacuum leak could be the culprit, especially given your unconnected vacuum lines
 

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yo,
for now;
DTC 12 can't control engine RPM high RPM self test; vacuum leak, TB base idle off, idle air valve dirty or bad, EGR stuck open. Check the IAC valve port in TB for Sludge; Suspect throttle body coking
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DTC 22 or 126 indicates the Manifold Absolute Pressure (MAP)/Barometric Pressure (BARO) sensor is out of Self-Test range. Correct MAP/BARO range of measurement is typically from 1.4 to 1.6 volts. Do NOT use an ordinary voltmeter to check a Ford BP/MAP sensor because doing so can damage the electronics inside the sensor. This type of sensor can only be diagnosed with a DVOM that displays frequency, or a scope or scan tool. Also make sure engine manifold vacuum is within specifications at idle. If vacuum is unusually low due to a vacuum leak, retarded ignition timing, an exhaust restriction (clogged converter), or an EGR leak (EGR valve not closing at idle). A low intake vacuum reading or excessive backpressure in the exhaust system can trick the MAP sensor into indicating there is a load on the engine. This may result in a rich fuel condition. A restriction in the air intake (such as a plugged air filter), on the other hand, may produce higher than normal vacuum readings. This would result in a load low indication from the MAP sensor and possibly a lean fuel condition. Possible causes: circuit open between sensor vehicle harness connector and PCM. circuit shorted to VREF, SIG RTN, or GND. Damaged MAP sensor. Vacuum trapped at MAP/BARO sensor. Unusually high/low barometric pressure. Kinked or obstructed vacuum lines (MAP). Basic engine (valves, vacuum leaks, timing, EGR valve, etc.). High atmospheric pressure. Damaged PCM. VREF circuit open at MAP sensor. SIG RTN circuit open at MAP sensor. The pinpoint test..." Read More Source: by miesk5 at FSB http://fullsizebronco.com/forum/showthread.php?t=202290
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DTC 13 Cannot control RPM during ER Self-Test, low RPM & Possible Causes;
if in Key On Engine Off test IAC did not respond properly (extends to touch throttle then retracts for KOEO test)

"...vacuum leak, use garden hose section to listen for leak noise; TB base idle off- Idle Air Control (IAC) Sludge; Poor Idle TSB 91-25-07 for 85-92 Bronco & F Series & many others; air bypass valve dirty or bad..." READ MORE Source: by miesk5 at FSB http://fullsizebronco.com/forum/showthread.php?t=178231&page=2
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DTC 77 System did not receive "goose" test during KOER test
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DTC 74 brake pedal Not depressed after engine ID was received in KOER
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DTC 65 with E4OD - cycle OD cancel switch after engine ID is received in KOER
 
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