help with my 90 fox

[jcint]

I just purchased a 90 foxbody it has a few things i need to fix bit my main concern is the idle and backfire. it has a cam ( NOT SURE WHICH ONE) and a trickflow intake. It has a big loop on idle and it feels like it's going to shut off but it won't ( on some occasions when i slow down it will shut off) whwn i get on it it feels bogged down and sometimes it backfires. Now it does have a pretty big exhaust leak on the headers, would this cause the backfire and bogged down feeling? Also I'm about to replace the headers gasket and noticed it missing a bolt anyone have this part number for the bolts. What can i get to stop the bolts from backing out.

 

[skunk21]

check the timing, might have to restab the dizzy. check the firing order, check the cap & rotor, check the plugs. If this stuff checks out then look at your fuel pressure, could be ignition related. I would also run a KOEO test for codes. clean your maf, check for vacuum leaks etc. I'm sure you will get some more replys but I would start with some of this, backfiring can be a case of bad timing or running rich or other factors. rule out the timing, firing order etc., and then work it out from there. best of luck.

 

[Mustang5L5]

i would bet you have a vacuum leak somewhere. Prob with the intake gaskets as a lot of people don't correctly seat the lower intake

 

[jcint]

anyone know what the part number is for the bolts for the headers?

 

[skunk21]

Ford racing has these
Products - Latemodel Restoration Supply

MAC
Header Bolt Kit, 5.0/5.8, 16Pc at LRS - Same Day Shipping!

or ARP

Products - Latemodel Restoration Supply

 

[HISSIN50]

Pull codes.

Fix the exhaust leak, as this can cause a rich A-F trim and popping.

You can use a bolt from the hardware store on the header if you need to.