View Full Version : TBI Problem
01-21-2006, 03:48 PM
I have an 89 350 TBI motor and when i leave home it runs great then after about 15 or 20 minutes when you hit the throttle it will choke and cough like it's starving for fuel(the fuel pump is new) then it will run like this for about 20 to 40 minutes and then clear up and run like a top again. Any thoughts would be appriciated
01-21-2006, 03:53 PM
rreplace the fuel filter first...it would only run like ass when under load aka foot into it, or towing..
dont know why it would be on and off tho...
id replace the ffilter and see what happends...cant gowrong wiht a 5 dollar part
WHEN YOUR DOING THE FUEL FILTER CHECK FOR WATER IN THE GAS
01-21-2006, 04:17 PM
disconnect the vac. line frome egr value if runs better this is your problem
my dads 318 did this for ever after he replaced countless fuel filters and vac. advance on the rotor
01-21-2006, 06:11 PM
bought a fuel filter plugs and a distributor cap and rotor today see if that helps
01-21-2006, 11:01 PM
sounds like maybe somekind of choke not shutting down properly i dont know what theey use for cold start just a though
01-21-2006, 11:16 PM
what about checking the fuel pressure regulator????????? 
02-07-2006, 02:38 PM
I also have a TBI but a 305 , mine just has no power... I have a 1980 jimmy with a 87 305 TBI that got put in it, all wiring was done, etc..anyhow seems like ya have on of these , ya woun't know what would be holdin the power back would ya? maybe running gears? just a question.
02-08-2006, 08:35 PM
Mine ended up with a bunch of sensors that were just old.The iac(idle air control) Throttle position sensor, the o2 sensor and the map sensor.The last one made the most difference really brought the power up.
02-08-2006, 09:49 PM
go to napa, buy a can or two of SEAFOAM. the stuff works wonders, put some in your gas tank, throw some in the crankcase, run it through the vacuum line. if yer still getting the problem, do everything above.
02-08-2006, 10:36 PM
[wtf] is SEAFOAM never heard of it or i missed the joke [1b]
02-09-2006, 07:25 AM
it's been a US product for years, they just recentley got it up to canada, as far as i know napa is the only supplier this side of the border.
02-09-2006, 10:37 AM
is it for removing moisture from the lines ?? 
02-09-2006, 03:46 PM
ya, gets rid of moisture, cleans carbon buildup, frees rings, lifters, valves. it's an all in one.
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