RDS928S

pk,

You describe exactly the symptoms I'am experiencing.

Has anyone used Carl's three wire TPS repalcement vs. the oem unit ?

Thanks Rich

IcemanG17

How old is the fuel pressure check valve......might want to change it....since it sounds like you already did the filter...also how old are the fuel pumps....when my fuel pump was slowly dying I had a bit of an hard warm start problem....its much better with the new pump and check valve....

RDS928S

Fuel pump has been replaced but check valve is orginal.

RDS

John Speake

Hard starts hot or cold ?

RDS928S

John,

car always fires up instantly first time in the morning then may require multiple cranks to start and a little proding from the gas pedal later in the day.

No consistant pattern though.

Thanks
Rich

Mrmerlin

It might be time to do a leak down test per the WSM , if its not good then a new set of injectors will cure a lot of the starting problems , as will the check vavle if its bad , and the fuel pressure regulator First try adding some techroline to a half full tank and doing lots of short trips (engine start and stops) this lets the techroline do its thing

John Speake

All good advise....... also check that throttle closed switch clicks when engine is warm, as well as cold.

IcemanG17

If you replaced the fuel pump chances are it came with a new check valve already in it..... Of course I replaced my check valve...then had the fuel pump die a few months later that came with a new check valve

Oh well so now I have a sub 1000 mile check valve sitting around....

Bill Ball

Carl's three-wire connector cannot "replace" a broken TPS connector. It can only replace both sides of the crank sensor connector or a similar knock sensor (not on 86 cars) connector. You may have one in the middle of TPS harness, but what is the condition of the TPS connector? This cannot replace it.

RDS928S

John S /Bill B/Mmerlin/PK,

I removed the intake tubes and complete air filter assembly in order to see if anything obvious was wrong under the intake.
I noticed the MAF was not seated properly in the intake and the top MAF O-ring was lying in the "valley" !!! WTF.
The car was recently in the shop for a complete AC rebuild along with power steering line replacement and new belts.
Apparently the mechanic pulled the MAF out of alignment when the air box was pulled out. The O-ring must have fallen off in the process.
I put everything back together properly and presto: instant starts and no bucking or exhaust popping at idle.

I put a to do list together based on yuor reccomendations.

TPS and new injectors are next.

Thanks Rich

John Speake

Excellent ! I like happy endings :-)

Mrmerlin

Great , glad you found your problem .

Tampa 928s

I have a set for an 86 just rebuilt injectors, have 2 min on them went to the fords after I thought I had a problem.
Make an offer!

928ntslow