I was wondering if someone has taking the whole fuel system of these jcars apart. I'm wanting to know how many rubber/plasctic pieces there that could be affected by E85. From what I've seen so far it's mostly steel lines and such. I don't want to have to drop the tank just to see what's up there if someone has been there done that. Thanks guys, oh, and I'm specifically interested in 1990 sunbird turbo but I"m sure the others aren't that different.
Aaron
1990 Pontiac Sunbird GT turbo
-TGP turbo
-DSM SMIC turned TMIC
-Injectors
Hi, Aaron.
There are flexible lines between the tank and the body on the supply, return, and vent lines. There may be a section of hose on the filler neck, can't remember exactly. Flexible hoses also exist between the body and engin, again on the supply, return, and vent line. Depending on the car and what's been done to it over the years, there's either a piece of hose or a pulsator between the fuel pump and sending unit. All screwed together connections on the return and supply lines are supposed to have Viton O'rings. The steel lines are mild steel. The fuel rail is chrome plated steel. Neither of these should be too highly affected by dry ethanol, although alcohols can absorb water.
-->Slow
Ok so I should be good to run E85 then?
By flexible you mean braided over rubber with screw on ends right? and Viton=ok for alcohol right? When your talking between the pump and sending unit, you're talking in the tank right? If that's the case I'm not really worried about it. I'll wait until the stock pump gives up, then I'll change it. It surely has to be at least mildly alcohol resistant any way... the government was forcing E10 in most places by 1990 any way right? Thanks for the input Slow
Aaron
1990 Pontiac Sunbird GT turbo
-TGP turbo
-DSM SMIC turned TMIC
-Injectors
Screw on ends? The ends are threaded to connect to the steel lines, but they're barb and crimp with the flexible hose. No promise on Viton and alky. Between pump and sender = in tank. If that hose isn't alky friendly pieces of it it end up plugging the filter at a minimum, and getting into injectors and regulator in worst case. Mildly alky resistant isn't good when high concentrations are present. Come on over and I'll show ya how fast "mild alky resistance" goes away in 100% methanol. Gamble if you want, ok by me. I just don't want you thinking I said it will all work okee dokee then find out it doesn't.
-->Slow
