popping under hard accelleration?

1slow95 · Jul 14, 2005

This is with the 418 in my sig. Whenever I really hammer on it, it'll pop in the upper rpms. I think it might be going lean because it also runs hot sometimes. Is there anything I can do to fix this without a tune? Im still using the stock FPR, will an adjustable one work as a band aid until I can get a tune?

wytstang · Jul 14, 2005

Holy crap your still using the stock FPR get that off of there ASAP. You need an adjustable(sp?) now park it. Pull the plugs and see what they say, chances are very lean especially in the upper RPM's.

1slow95 · Jul 14, 2005

Yeah, I've been saving for a new starter, but the car will usually start now so I may have to go with the FPR next.

I'll check the plugs tonight if the weather clears up.

94gts · Jul 14, 2005

wytstang said:
Holy crap your still using the stock FPR get that off of there ASAP. You need an adjustable(sp?) now park it. Pull the plugs and see what they say, chances are very lean especially in the upper RPM's.

yea i didnt even run the stock fpr with a stock motor and nitrous. get that thing outta there. a cheap used one will do the job.

1slow95 · Jul 14, 2005

I'll get one next week after I get paid. Any reccomendations?

Also, if I remove the upper intake can I re use the gasket? I only have about 200 miles on it.

YEAHLOH95 · Jul 14, 2005

i have an idea why your car is running hot your upper rad hose is kinked i just looked at it in your picture thread in talk that will not let the water flow right .

troy

94gts · Jul 14, 2005

YEAHLOH95 said:
i have an idea why your car is running hot your upper rad hose is kinked i just looked at it in your picture thread in talk that will not let the water flow right .

troy

holy crap hes right. its gotta be kinked to the point of where its flowing 1/2 what it should.

Low-5.0 said:
I'll get one next week after I get paid. Any reccomendations?

any brand really. my bbk works great.

Low-5.0 said:
Also, if I remove the upper intake can I re use the gasket? I only have about 200 miles on it.

you always COULD reuse it, but i wouldnt. you shouldnt have to remove it to do a fpr

1slow95 · Jul 14, 2005

YEAHLOH95 said:
i have an idea why your car is running hot your upper rad hose is kinked i just looked at it in your picture thread in talk that will not let the water flow right .

troy

I knew it was kinked a little, but I never really that would be much of a problem....Looks like I'll be adding an upper radiator hose to the list of parts to get sooner rather than later.

I'm too lazy to work on the car tonight, so I'll check the spark plugs tomorrow night.

I shouldn't have to remove the upper intake to get to the fpr, but it would make it a whole lot easier. I'll use that as a last resort if I start doing too much

mootang · Jul 14, 2005

i always reuse my gasket for the uper intake. haven't had a problem yet.

also can't you just cut the hose shorter to eliminate the kink?

1slow95 · Jul 14, 2005

Where would I cut it at to eliminate this kink?

My cousin has some of that flex-hose stuff left over that I can get real cheap, so I'll just give that a try.

mootang · Jul 14, 2005

cut it shorter where it clamps to the radiator if there is enough there. cut like an inch and see if it is enough. it's hard for me to tell for sure from the pic if there is enough hose in front of the curved part to cut.

yellow1995Cobra · Jul 14, 2005

Low-5.0 said:
Where would I cut it at to eliminate this kink?

My cousin has some of that flex-hose stuff left over that I can get real cheap, so I'll just give that a try.

I doubt thats the reason your running hot. But anything is possible. Mine was exactly the same way, and the motor ran very cool with that summit rad.

Pic- not the best cause it was kinda dark, but u can see pretty much the same exact kink.

HISSIN50 · Jul 14, 2005

FWIW, I had to cut the top hose down a bit (I used a 26" wide radiator. It mounts in the stock location on the driver side and comes up short on the pass side - I wanted to steer clear of the ABS pump).

The top rad. hose was 3-4" too long laterally (meaning that I could not cut one end or the other to have any meaningful effect).

I ended up cutting it in the middle (where it runs transversely) and shortening it and then using a metal pipe from the home store (sort of like what blower guys do) to join the hose back together.

I would like to use one hose, so if anyone has ideas (more info on this cheap flex hose would be cool - if it is something I could get cheap too).

When I did the radiator, I talked to Brian (who also used a radiator which was less wide than stock) and he had used metal flex hose from Summit, but it was upwards of 100 bucks when I looked. I could not swing that.

Good luck!

final5-0 · Jul 14, 2005

Mike

That stroked windsor is driving your poor pcm nuts.

The load that is being produced by that bad boy stroker has all your load tables fubared and even then, beyond that.

You gotta get that thing tuned.

I don't see how working with the fuel pressure is gonna give you a lotta help.
I mean to tell ya, with 42's, you most likely are getting enough fuel.

Later
Grady

95cobra50 · Jul 14, 2005

mines been poping for a year. It would start at about 4k in first and 4,5k in second then 5k in 3 and so on but i just played with my timing and it went away.

1slow95 · Jul 16, 2005

Hissin50, yeah it's the summit flex hose. It's only $100 if you get it with the shiny chrome end caps. Without them I think it's around $50. My cousin has a short piece left over that he said he'd sell me cheap if it will fit.

So what else could cause it run hot? I know timing will, but I have it set right at 10*...If the rain ever lets up today, Im gonna check the spark plugs and move my fan up a little higher.

HISSIN50 · Jul 16, 2005

Mike, Thanks for the hose info.

1slow95 · Jul 21, 2005

Well, it seems to be missing a little and I think that is causing it to pop. Will a tune fix that, or should I look for another problem first? The distributor, wires, and plugs are all new but Im still using the stock TFI module and no MSD ignition box. The coil is an Accell one that is about 3 years old now.

Here's what the #5 spark plug looks like after 200 miles.

steve hansen · Jul 21, 2005

mine pops the same damn way
gotta figure this out

1slow95 · Jul 22, 2005

popping under hard accelleration?

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