351 not running right
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Junior User
Joined: Apr 2003
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351 not running right
well heres the story took the 89 f250 apart for a intake leak then figured im this far might as well do head gaskets too so i take the heads off get brand new oem ones from michigan motor exchange and put em on tourque evrything down good and right order. get her all back together start sounds good at idle minus the exhaust leak..... looking at it realize my manifolds are glowing bright red in the bright sunlight obvious problem... drive it in to muffler man to get exhaust no get up or nething.... pedal to the floor tops out at 25mph in 10 mins... muffler man says that ive either got a cracked block or cracked head but they wont tear down to figure it out.... so if u guys could help me any it would b nice. so my question is what do u guys think it could be if nessacary ask me some questions and ill answer them the best to help me figure this out..... thank you bryan
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i replaced them because i was told that the motor was rebuilt but didnt trust it as i already needed intake gaskets not 3 mths after a rebuild and upon removeal i found my head was cracked so just preventitive maintence...
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Joined: Mar 2006
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From: Missouri
when its running is the exaust flow normal ? I had a cat clog on an old pontiac it didnt run for **** until I cut the cat opened I drilled a hole in it and took all the little beads out of it then welded it back shut never a prob after that .
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well i replaced both heads with brand new remanufactured stock heads... and now that u guys mention it the flow out the tail wasnt really all that good.... i mean i plan on going catless when i do the exhaust but that wont be till after shes running so ill cut her out.....
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From: Oak Harbor, OH
Glowing exhaust indicates either a lean condition, or improper timing. The no power also tells me the timing is way off. Cylinders are numbered starting at the front on the passenger side 1 2 3 4, and 5 6 7 8 on the drivers side. Make sute you're got your distributor in right. I think in '89 it's EFI, so you might try changing the fuel filter.
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welll cut the cat off only to find someone already had her gutted so i got nothiong out of the night she stll wont top oyut at more then 25 so idk now besides timing....being offf..... now i was told im runniong really lean how do i fix that
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yea i cant thank you guys enuff i no im not very outhere with helping others but with ypur guyses help ill be sure to help the next time i think i have an idea.. but how would i make the truck run a bit richer
bryan
bryan