On my way to the picnic and...

[Flyn]

...I find I have a full throttle bog. It's serious enough that I turned around and headed home. Part throttle operation is normal but when I get to full throttle the car misses/bogs. It's bogging like a carbureted car that is getting too much gas. Checking air/gas/spark, I pulled the air filter off and replaced it with an old one. No difference so it's not a dirty air filter. My next guess is something fuel related. Boost a pump? clogged injector? I'm not sure what would allow normal part throttle operation but show up as a full throttle bog/miss? Anyone had this happen or know the cause?

Click to read more...

 

[Tom]

I had that happen in a GT of mine. Ended up being a bad tank of gas. Not saying it can't be one of the items you mentioned , but, did you recently fill up?

 

[Flatliner]

Fprs and get back out!

 

[Flyn]

I did fill up last night.

I guess it could be the FRPS but it runs fine under part throttle which it didn't last time it broke on me.

Thanks for the ideas, guys. I am going to look at it again in the morning.

Edit - I wonder if it could be the fuel filter? Maybe I will change that tomorrow.

 

[Wiked03]

Fprs and get back out!

+1 Thats how my car felt when I blew my frps. Fine driving around, but at WOT it would bog bad around 5k rpms.

 

[Jimy Bilmo]

Ahh, no bueno. Hope all gets fixed up ASAP for this nice weather we're having!

 

[Flyn]

You guys may be right about the FRPS. I took it for another test ride and now it is missing at part throttle. It now feels like it did last time the POS FRPS went out on me. If it is the FRPS, the diaphragm may be continuing to rip causing the fuel delivery to get worse and worse. I'll pick one up from Sutton in the morning and replace it.

 

[ShelbyGuy]

I missed ya out there today at the picnic, Cliff. We needed more of the 'over 35' crowd

 

[Jimy Bilmo]

Nice to meet you and the pooch today!

 

[Flyn]

I missed ya out there today at the picnic, Cliff. We needed more of the 'over 35' crowd

I would have liked to see you and Wunderkind, too.

 

[hazmat404]

also have you cleaned your MAF lately? i know on my old 95 gt i had that problem but it was all within the same 20 minute ride. first the WOT then the part throttle and all it was was a clogged up MAF wire. not saying its that but worth checking

 

[Flyn]

also have you cleaned your MAF lately? i know on my old 95 gt i had that problem but it was all within the same 20 minute ride. first the WOT then the part throttle and all it was was a clogged up MAF wire. not saying its that but worth checking

I looked at the wire but didn't see any obvious contamination and didn't clean it. If the FRPS doesn't work, I will try it.

 

[Sharkster]

get a KB damper disc in under that FRPS

 

[Flyn]

get a KB damper disc in under that FRPS

I had one and it didn't prevent the FRPS blowing out for the second time.

Good news is the problem was the FRPS and it's a 5 minute repair. It failed for the third time in my car's lifetime. I was thinking it probably wasn't the FRPS because I thought James had told me the FRPS wouldn't blow with his tune. Maybe I am remembering wrong.

Ford also raised the price on the FRPS. List price is now $88.32. Thanks to Sutton for getting me the part and for taking care of me and thanks to you guys for your suggestions and advice.

 

[Flatliner]

...Good news is the problem was the FRPS and it's a 5 minute repair. It failed for the third time in my car's lifetime. I was thinking it probably wasn't the FRPS because I thought James had told me the FRPS wouldn't blow with his tune. Maybe I am remembering wrong. ...

Actually, I think you are right... I remember him mentioning that the newer tunes don't require this. You may want to give him a jingle or something.

 

[Flyn]

Looks like I spoke too soon. Car revved OK in the garage but when I took it out for a test ride after the rain stopped, it is still bogging. NOT the FRPS. I'm going to bring it to Sutton tomorrow morning to get it diagnosed. There are too many possible causes to keep replacing parts.

 

[Flatliner]

My next two guesses would be coil pack and injector. I'm sure Sutton will take care of it. Keep us posted!

 

[JymBart]

Cliff, . did you find out the answer to the problem?

JymBart

 

[Flyn]

I just picked up the car. Turns out it was the fuel pump. I thought it was probably either fuel delivery related or electronic. Fuel delivery FTW.

Big thanks to Sutton for getting my baby fixed.

 

[Jack]

I just picked up the car. Turns out it was the fuel pump. I thought it was probably either fuel delivery related or electronic. Fuel delivery FTW.

Big thanks to Sutton for getting my baby fixed.

good deal.

 

[Flatliner]

I say we have another picnic in light of the car being fixed...