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I’ll agree that 2v heads don’t flow good at all, but it’s still a very capable engine. A few mustangs ago, I had a stock engine 04 GT’ with a big single turbo that made 500rwhp all day long. I hurt a lot coyote owner feelings with that car... I’ve been taking a lot of pictures and will...

A 4.6 simply just to be different. I know the 2v is not the best engine choice, but it’ll make more power than the worn out 302 that was in it. The 302 had valvetrain issues and the T-5 had bad synchronizers. I’ve owned a few new edge GT’s before, so I’m quite familiar with the 2v. At least the...

I'm in the middle of converting my fox body to a 4.6, and at the point where I need to find an engine for it. A PI 4.6 out of a mustang is impossible to find around here, but there are plenty of F-150, Crown Vic, town car, and explorer 4.6's. The DOHC 4.6s are all also either way overpriced or...

Messed with the car again this morning. I noticed the idle was wildly uncontrollable. It wasn't the typical surge, it was just all over the place. The car then developed a rattle type noise that appeared to be coming from somewhere in the center of the engine. Shortly after that, tapping noises...

Got it all back together today and fired it up. Let it warm up and checked for leaks, then set timing. No leaks! but it is still the same rough and rich idle. The vacuum gauge was low, 14", with a rapid vibration that steadies out at higher rpm. According to a bunch of different sites, that...

I got the lower installed today. Used "the right stuff" gasket maker for the front and back(skipped the rubber gaskets), and also put a ring around the coolant ports. Followed the torque sequence, and now I'm just giving it 24hrs to dry before I try starting it up. I did notice that the rubber...

I got the lower intake off today, no real surprises there. The gaskets were definitely blown on the rear coolant passages. The intake port areas of the gaskets seemed to be fine, but hard to tell. It was the original 34 year old ford gaskets. If there had been a vacuum leak, would it be...

Put the new MAP sensor in, no difference whatsoever. I don't think it's going to be the plug gap either, but I'll still try bring it down maybe to like .048-050. I would think spark blowout would get worse with higher rpm or engine load, but mine seems to be better in those situations. I would...

Yeah, that was going to be my next question. I had a slight suspicion the TB could be to blame. The only reason I put the 70mm TB on in the first place was because the spring was rusted and sticky on the stock one. I ended up throwing the stock one away, but lowering the gap is worth a shot...

Hmmm... after reading that I think it might be worth pulling the lower intake to replace the gaskets. I didn’t do a smoke test, but I did spray everywhere with carb cleaner, and when that didn’t produce any results I tried spraying propane. Also no results. I’m thinking I’ll try the lower...

The ECU was a DA1, but a faulty DVOM led me to believe it was outputting incorrect vref voltage, so I replaced it with a refurbished one from Autozone. I double checked the part numbers from the company that refurbishes, and it checks as a speed density 87-88 5.0 mustang. There was absolutely no...

Poteet isn't far at all. Thank you for posting the links to those diagrams! I think I had seen a few of those diagrams before when I first started trying to figure this out. I ran through most of the sensor tests, and found that the MAP sensor is not at all close to passing the sensor test. With...

I had some free time today, so I double checked a few different things. The computer was already pulled out and battery disconnected, so I decided to test wire continuity for pretty much every sensor. MAP, TPS, IAC, ECT, ACT, O2s, and the injectors I could get to all had good continuity from the...

Yeah the ECU is good. A bad DVOM lead me down a path of replacing the factory ECU about a month ago, which was actually good. It got replaced with a refurbished ECU and there were no changes whatsoever.

Yeah I've also got a thread on Stangnet about this. With a vacuum gauge hooked up, it'll read around 14-16" with a little bit of fluctuation. I was assuming the fluctuation was from the idle surging... The spark plugs(new Motorcraft AWSF32C) are all gapped at .052ish. I double checked them the...

If I test the O2 pins on the computer they stay at 0.9v, sometimes they'll dip down to 0.8 but it mostly stays at 0.9 which I guess makes sense it it's running very rich. With the vacuum gauge hooked up, I tried isolating sections of the vacuum system and there was no change with the brake...

It can't be clogged exhaust. I just installed the shorties, off road X, and Pypes mufflers about 4 months ago. TDC does seem to line up. When I get air coming out of the #1 plug hole, the rotor is pointing at about 12 o' clock and the balancer is at TDC. I have a new MAP sensor and the original...

Yes, the vacuum reading at idle is 14-16". On the low side. Everything I read said low vac means timing is off or a leak, but I am 100% sure there is not a leak. I tried adjusting timing with the vac gauge hooked up. The car seemed to like advanced timing of around 14-15 degrees the best. The...

I’m not absolutely certain on the injector size. They are the OEM Bosch 5.0 orange explorer injectors. Those are 19lb right? I am certain that the engine has never been opened up before. Does a cam just become undegreed? There’s no valve train noise and the timing doesn’t move at all with the...

I never noticed earlier, but the negative connection on my battery is just a standard cheap-o Autozone one. The other small ground wire coming off the negative connection just goes to the headlight ground. My computer ground connector just goes to the connection on the fender. I did also install...

I tested the voltage of the ECT at both the connector and ECU and it's the same correct voltage. The ohm test is also the same and good. I also tested the ohms at the connector for the ECT circuit and got 18K... got 17K for the ACT circuit. I think that is tolerable right? I also went back and...

No matter how many times I cycled the key, pressure stayed at 0. On the first start it never fires right up. It cranks for about 2.5-3 seconds before starting. If I turn it off and then go to start it again, it will usually fire right up. There’s no gas in the fuel pres reg vacuum line. Pressure...

I did test the voltage across the ECT sensor and it was reading what it should be based on various operating temps. I also tested it at the input to the computer and got the same voltage, so no issues there. Something I just noticed today, I have a cheap-o fuel pressure gauge connected to the...

Yeah the salt & pepper shakers are good. I've pulled them apart to do "the fix", as well as clean them a few times just to be sure. I've also verified the resistance for a lot of the sensors on both sides of the connector.

It's not the PCM. It was just replaced, but I double checked it anyways. All good there. I did measure the O2 sensor voltage at the PCM and noticed that it doesn't really cycle. It was holding around 0.9v, and would occasionally dip down to 0.6 or 0.7v real quick, but it didn't seem to be...