hey my friend is gonna buy a 2nd gen and it wont go over 15 mph and when i asked the guy selling it he said that something opens to soon... would the aux ports open to early cause anything? and im also thinking maybe a vaccuum line opens or something... anything will help. thanx.

 

tps?fuel delivery issues? not a vacuum leak though.

 

auto tranny? Clogged Cats?

 

Not the aux ports.

If it's an S5, it could be limp mode.

 

Clogged cats would cause that? And limp mode? And I'm pretty sure it's a manual... Would it be a lost cause? It's an 87 gxl and he is sellin it for 850 cuz everything else is clean but that 15mph limit.

 

im not sure if s4's have limp mode (CONSIDERING HE HAS AN 87 GXL) kinda sounds like limp mode, is the check engine light on?

 

There's no limp mode on a series four.

How does it idle? Sound normal at idle?

If it sounds more or less ok at idle, then once the engine warms up, disconnect the TPS connector and try to drive it. Might work, might not. Too little to go on.

Car as described is worth mybe three hundred bucks on the OUTSIDE to me. And then it'd have to be pristine.

 

There is another thread reguarding a 4k RPM limit. ( https://www.rx7club.com/2nd-generation-specific-1986-1992-17/1986-n-wont-rev-past-4-000rpm-753264/ ) may be the same issue. One fellow fixed his issue by replaceing the 2ndary injectors. Myself and another fellow aren't so lucky. His problem started after a check engine light. My problem was preceeded by a coolant alarm - not sure if it's related. (I have not checked for codes yet).