bad FPR symptoms?

[1990LTD]

FWIW, it gets an italian tune up from time to time.

[86VickyLX]

Que?

[tjc78]

I think that means you get on the highway and beat the shit out of it.

[1990LTD]

I think that means you get on the highway and beat the shit out of it.

Drive it for a while in 3rd past where I'd normally shift into OD, prettymuch

[86VickyLX]

Put it in second gear at 45. It'll clean everything. Hell, My car was shooting out carbon chunks in 3rd gear on the dyno. lol.

[91waggin]

The term "Italian tuneup" stems from old exotic car mechanics. Customers would bring their Ferraris or whatever in because they were running poorly, often because the owners would baby them too much. The mechanics would take the cars out for a high-speed, high-rev run, blow all the carbon out, and return them to the owner.

[cld783]

question: What does a fuel pressure regulator do (or fail to do properly) when it's starting to go bad?



relevant information: My car has always taken what I consider longer than normal to crank. Key on, turn to crank, engine cranks 3-4x and fires up. If I crank it and only let it turn once or twice (especially when cold) it won't fire, but then usually on the second attempt, first crank it will fire immediately. Makes me think fuel problem but I am a n00b.

sounds normal to me but hard to say without seeing it.. the eec does delay the starting for a second or two to promote oil flow.

[86VickyLX]

sounds normal to me but hard to say without seeing it.. the eec does delay the starting for a second or two to promote oil flow.

Supposedly. But I've had instances where you literally touch the crank position on ignition switch and the bitch starts.

[1990LTD]

Supposedly. But I've had instances where you literally touch the crank position on ignition switch and the bitch starts.

The videos I've seen of guys starting their 5.0 Panthers all have the cars turning over faster than mine does.

[91waggin]

The videos I've seen of guys starting their 5.0 Panthers all have the cars turning over faster than mine does.

You mean the actual cranking is faster? Or it takes fewer cranks to start? Because of the fact that the 89 and older starters don't have the onboard solenoid, they sound completely different and I've always thought they sounded like they were turning the engine over at a quicker RPM. I know mine, especially when cold, takes 5 or 6 cranks to start up, but if you crank, let go, then crank again it'll fire on the second rev. I have always been told that the EEC delays starting, especially when the engine is cold, to promote oiling on the cold engine.
A carbed engine in good tune will often catch as soon as the starter is bumped.

If you think the starter is turning the engine too slowly, consider replacing starter. If starter is new, replace battery cables. I had a problem recently where the starter tested good and the car wouldn't start at all. It didn't get worse over time either. I drove to the store, parked. When I came out, the car just wouldn't start, and I had to have it towed home so I could replace the battery cables. I also upgraded the cables from 6ga to 4ga, but I still used marine terminals like I always do.

[1990LTD]

You mean the actual cranking is faster? Or it takes fewer cranks to start? Because of the fact that the 89 and older starters don't have the onboard solenoid, they sound completely different and I've always thought they sounded like they were turning the engine over at a quicker RPM. I know mine, especially when cold, takes 5 or 6 cranks to start up, but if you crank, let go, then crank again it'll fire on the second rev. I have always been told that the EEC delays starting, especially when the engine is cold, to promote oiling on the cold engine.
A carbed engine in good tune will often catch as soon as the starter is bumped.

If you think the starter is turning the engine too slowly, consider replacing starter. If starter is new, replace battery cables. I had a problem recently where the starter tested good and the car wouldn't start at all. It didn't get worse over time either. I drove to the store, parked. When I came out, the car just wouldn't start, and I had to have it towed home so I could replace the battery cables. I also upgraded the cables from 6ga to 4ga, but I still used marine terminals like I always do.

er, I mean it takes too long to start. I have a new pmgr starter and all of my cables are new. it cranks as fast as it ever has. sorry for the confusion.

the only time it's slower than normal cranking is -20 or -30 weather....

[86VickyLX]

Just put an adjustable fuel pressure regulator on my car. You gotta pull upper intake off to get one on the bolts. If you pull the intake off, it makes it easier to get at all of the bolts.

[1990LTD]

It's probably been discussed before, but what good is an adjustable regulator?

[1987cp]

It's like, adjustable and stuff.



I've gathered that for some carb types, tweaking the fuel pressure is a normal part of their tuning procedure. I've also heard of SEFI goons doing it, though I've also heard that it's not highly recommended.

The regulator that started spewing on me was a Holley adjustable, BTW. No idea what went wrong.

[1990LTD]

I didn't drive the car for about 48 hours and went to start it today and it barely cranked (starter was spinning as fast as it always has, volt meter read 12.something) then fired almost as soon as I put the key in run. It cranked for a split second and fired immediately.

As always I let the fuel pump prime and stop before turning the key to run.

Bad injector? Temperature and humidity rose slightly in the past few days with the change of seasons - Perhaps fuel from the leaking injector was partially atomized in the cylinder before I turned it over? I don't know much about anything but that's my first assumption.