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Thanks, I looked but don't think any of the casting numbers for my heads are visible without pulling one of the valve covers. I'll pull one this weekend to grab them. Also, the GT40 heads I'm looking to use are at the machine shop getting checked out, so I'll have to get those later as well. I...

Thanks Miesk, great info! Comp Cams and FireGuy both recommended the 35-255-5 for Flat Tappet, Speed Density, Fuel injected 302's. I'm on the fence now though about what to do because Comp Cams only recommended the cam if I kept the stock heads. The guy I talked to didn't think that the cam...

So I was actually able to find some GT40 heads at a junkyard in Oklahoma to replace my stock heads. I dropped them off at the machine shop earlier today to get them checked out. I am hoping to get a little more power on the low end, but I don't want to sacrifice gas mileage. I have a 1989 XLT...

Finally got back to the Bronco this weekend. I installed a new Knock Sensor I found on ebay with the same results. I checked codes after and I'm still getting Knock Sensor not detected (25), as well as 12 and 52 - RPM idle out of range and Power Steering Pressure Switch open. I decided to...

Thanks Miesk, May be a long shot, but I actually have a line on a new knock sensor through ebay. Once it comes in, I'll confirm if it matches the old one for anyone else looking. If it doesn't, then I'm going to adjust the timing as stated and I'll move the old one out of the way, but put it...

So I changed out the PCM and also tested the EGR and EVR, which both seemed good. Unfortunately, the new PCM didn't fix things. Still has surging idle on start until warm and power loss. My latest thought is the Knock Sensor, since it always gives me the code for it. I had kind of just been...

Thanks guys! Think I will look for another ECM and will also run the tests on the EGR and EVR above. Has anyone had any luck with the rebuilt ECM's from the parts stores or would you go to a specialty store instead? I found one specialty store in town (Houston) that says they have one on the...

Thanks guys! Ended up changing the EGR, now I’m getting code 32 - EGR Presssure Feedback Fault, so I’ve got some more testing to do. Also, out of curiosity, I pulled my ECM to give it a look. Not sure exactly what i’m looking for, but are the dark spots around some of the components...

Not sure if I did this right, but here goes. Still checking for vacuum leaks. With engine off, I blew smoke into the intake from one of the vacuum hoses coming from the intake tree. Hoping to see if any smoke comes out anywhere to identify a possible leak. Smoke came out of the EGR valve...

Thanks, I'll check that off of the list. :)

Checked fuel pressure last night and got 30 at the rail at idle. Increased rpm's and it briefly went up to about 34, then dropped to 29-30, where it stayed. The manual states it should have between 30-45 psi at the rail at idle. Could being on the low end cause the idle to surge when cold and...

Latest update is I started with the EGR valve. Tested the EGR Solenoid and the Sensor and they both tested good, so replaced the EGR Valve. Unfortunately, didn't fix the problem. I'll probably keep checking for vacuum leaks or check the EVAP system next as I work through the list of...

Thanks Miesk! I'll start chasing those and report back.

My ‘89 is coming along, but it has erratic idle at startup, which evens out after 5-10 seconds if it doesn’t stall. Also, it has no power. It has the 5.0 with AOD transmission. The engine was recently rebuilt and I am about 400 miles into the break-in. So far I’ve replaced the O2 sensor...

Thanks Tiha and Miesk. I'll plug it and move on. Much appreciated!

Sorry, it is a 1989 with a 302. I circled the port below in the diagram you sent.

I recently pulled my engine for a rebuild and am about 3/4 of the way done putting it back together. I just noticed an empty port in the lower intake on the drivers side, between the two fuel rail mounting bolt holes. I’m going through the pics I took during the tear down and can’t find...

Thanks Miesk. I ended up getting code 22 for MAP sensor out of range. I replaced the MAP sensor and now all good. I'm getting closer, but it's still going to take a while to get all of the bugs out. Up until about 9 months ago when I bought it, it had been sitting without running for quite a...