My 91 245 67,000 cranks over, but won't start until I give it gas then it stalls out unless I hold the pedal down. It gets worse when the weather is warmer. I'm getting codes 221, and 323. I've replaced the in-tank fuel pump, strainer/sock filter, sending unit, main fuel pump, fuel filter, o2 sensor, timing belt, cleaned fuse terminals, re soldered fuel pump relay (the white box pass side), cleaned battery and coil terminals, changed spark plugs, plug wires, cap, rotor, swapped with a good air mass meter (from 87 240), changed air filter, temp sender (the one that works the gauge), checked all hoses and wires in the engine compartment for leaks and cracks, cleaned the flame trap, dry gas. Any ideas what else it could be?

I changed the coolant temperature sensor, reset the codes (by disconnecting the battery for about 20 minutes), the check engine light went off but now the service engine light blinks intermittently. Drove the car to and from work a couple of days. I let the car sit for 24 hours, went to start it, cranked it for a while gave it some gas it started, but a giant puff of smoke came out of the exhaust. Would a bad fuel pressure regulator cause that?

Hi there,

I've replaced the in-tank fuel pump, strainer/sock filter, sending unit, main fuel pump, fuel filter, o2 sensor, timing belt, cleaned fuse terminals, re soldered fuel pump relay (the white box pass side), cleaned battery and coil terminals, changed spark plugs, plug wires, cap, rotor, swapped with a good air mass meter (from 87 240), changed air filter, temp sender (the one that works the gauge), checked all hoses and wires in the engine compartment for leaks and cracks, cleaned the flame trap, dry gas.

Looks like you're a fan of the "process of elimination". Lucid has the correct advice regarding the AMM substitution, and the ECT could certainly give you those rich symptoms, but another one to eliminate is the fuel pressure regulator (FPR) assuming you don't have a means of measuring fuel pressure. Sorry if I missed this in your list.



--
Art Benstein near Baltimore

Before you criticize someone, you should walk a mile in their shoes. That way, when you criticize them, you're a mile away and you have their shoes.

... the reverse is not true because the 2.2 ECU looks for the 007's CO adjusting pot,
which the 016 AMM does not have.

It could be the temp sensor you didn't change. If resistance goes high, extra (un-needed) fuel is delivered. More pedal allows more air, tending to lean out the rich mixture.

Check the 700/900 FAQ Feature for Engine Coolant Temp (ECT) sensor testing (same FI and Ignition as 240).

--
Bruce Young, '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.

The 87 has an LH 2.2 injection system. The 91 has either LH 2.4 or LH 3.1. The air mass meter you hooked up from the 87 is not compatible with the 91. That could be part or all of your problem. Good luck.
--
Harold Thompson '84 245 Virgos

Yup, its more than likely LH 2.4, which would be an 016 AMM.

221, 232, 231 are the error codes, sorry for the mix up.