Question about 1990 Buick Century
He was spraying into a throttle body that consists of an injector(TBI). these cars suffer terribly from EGS(ethanol gas syndrome). Do these simple steps. First; change out fuel filter(buy 2 of these-get the cheapest ones you kind find). Buy a can of SEAFOAM when you get the filters. You need to fill tank with as much Premium fuel as you can.<p>
Change out filter, add SF to gas. Keep car running at least 5 minutes on as steady an idle as you can. Drive car hard for at least 2-3 miles. When you get it home; change out fuel filter again.<p>
The fuel and the emission systems should start to get better. One other thing: buy a new PCV valve(probably cost4-6 bucks) replace it also.<p>
Clean out air filter or replace. Do not!, use carb cleaner or ether again. This should be helpng the cleansing process by now. Your car is full of corn liquor by-product and excessive amounts of water. It's in your fuel; your emission systems and your TBI. Your pump may be filled with it, and not have enough Psi to allow the pump to pump properly. In extreme cases, we've had to replace pump, remove fuel tank and clean it.<p>
When this is all done, always add SFoam every 3-5000 miles to prevent this from happening again.<p>
And at times; the crank/cam sensor has to be replaced.<p>
I don't know how much this car is worth to you, but this is simplier than buying an engine.<p>
The worst case I've seen is the ethanol burns a valve and it has to be rebuild. So try this, I think you can rescue it. Good Luck.
Posted on Sep 07, 2009
Testimonial: "have not tried but it rings of truth,very concise reply and this tech knows what is going on,thanks so much Ernie"
He sprayed the TBI (throttle body injector) and this shouldn't have hurt a thing. I belive that IF anything went wrong he MAY have gotten the connector wet were it joins the injector, but I belive that you already had trouble that happened to die about the same time. If it dies after you prime it, meaning its only running on what you gave it, I would lean towards the fuel pump.
Posted on Sep 07, 2009
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Posted on Jan 02, 2017
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This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control
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