Crossing the plugs may have 'upset' one of the injectors. The temp sender for the efi is not the same as the one for the dash. If the car has boiled alot then the temp senders (both) are suspect as is the thermostat. Go through the wiring to the injectors again - possibly a pushed back pin or socket or one is electricaly loose. Injectors are often 2v only - unsure about yours.

 

Crossing the plugs may have 'upset' one of the injectors. The temp sender for the efi is not the same as the one for the dash. If the car has boiled alot then the temp senders (both) are suspect as is the thermostat. Go through the wiring to the injectors again - possibly a pushed back pin or socket or one is electricaly loose. Injectors ore often 2v only - unsure about yours.

What do you mean by upset one of the injectors and wouldn't that have been fixed when I replaced all of the injectors which I did last night aka after the plugs were crossed?

Are you saying I should try and replace both sensors and the thermostat?

I triple checked the injectors last night before I installed them and they were all fully seated in the fuel rail with the clips on all the way. I also checked it when I put the injectors in to make sure all were fully seated inside their respective holes as well as making sure all of the electrical connectors were fully seated on the injectors. Does that cover everything you mentioned in the "Go through the wiring" part?

Please elaborate more on the importance of "Injectors are often 2v only -unsure about yours.

thanks for the help I really want to get this problem solved

 

 

"Back at the end of May/early June (1 month before the miss problem started) I replaced the timing belt along with the accessory belts, distributor cap and rotor"

I also pulled it apart with my hands after this problem occurred (couldn't take it off because the fan clutch is in the way) but i was able to visually inspect most of it for carbon streaking and the 1/4 or so that I couldn't see I ran my finger along and my finger was clean afterwards so I'm pretty sure that the "Dizzy cap" is fine. nice picture though :rofl:

Oh and all the plugs are firmly in place and in their correct position on the dizzy cap and on the spark plugs

 

I'm beginning to think that this is a fuel issue because when the car is idling I can not hear a miss and if I slowly increase the revs or hold it at a certain rev there is still no miss. The only time there is a miss is when you are nearly at full throttle to full throttle. I'm guessing then that its going to be a fuel pump issue or a fuel pressure regulator issue. what do you guys think?

 

If you were to have somebody hold the rev's high while you sniff the exhaust... Does it smell rich? I know my "e" model was having the same issue. I replaced the engine tempature sensor and cleaned the afm, the Idle air control valve and ran some seafoam through the gas tank and cleared it up. Not sure what symptoms of a faulty tps switch is on our cars.. I do know their a common failure though.

 

re. the temperature gauge not working - my dad advised that he had two of the wires wrong when he replaced the connector(he doesn't remember which specific ones, two of the smaller wires), fixing that cleared that problem - the temperature gauge is working now - and the 1223 code went away after disconnecting and re-connecting the battery cables to reset. The code is now 1444, which is normal. Re. overheating, the car never boiled, but was running a bit hot is all.
The fuel pressure regulator was checked by sniffing the vacuum line going to it for gas fumes - there were some, but no raw fuel - and sucking on the vacuum line to the regulator, there did not appear to be any leaks - the regulator held vacuum. There appears to be ample fuel coming out of the supply hose, strong flow, but not sure what is normal and I have not checked the pressure (no fitting to do that, though I do have a gauge).
Just checked the injectors with it running, using a stethoscope, and all appear to be firing, also cannot detect which cylinder misfires on acceleration. Idle is a bit rough, but it runs up to redline with a gentle throttle no problem and no apparent misfire. Accelerate and it misses, every time, very regular, not sporadic. I am thinking it's fuel - not enough pressure.

 

you have to add a fitting to check fuel pressure. have you checked the spark plug wires for proper ohms? you could have a cracked wire that when the engine starts to vibrate more could be sending some of the spark to the head.

 

Hi, Yes replace both temp senders and thermostat. If the engine loom has a plug that allows engine removal without disconnecting each item check that plug too. It sounds like you have a bad track on either the TPS or the air flow meter. Both are fixable for minimal cost, I saw it on another forum. Running up with the car static will not give full air flow or use full throttle. (I'm lucky enough to have access to a chassis dyno so I can run up a loaded motor) I'd go with plug leads too, if they are old. If the injectors have been replaced since the crossed plug then all is well but 12v on a 2v injector will cook it.

 

Below the intake manifold is a round harness connector which carries the wires for all injectors, and both coolant temp sensors. It is notorious for causing problems. It could be cracked, corroded or both. Give it a good cleaning and see if that helps

 

I've already replaced that connector with a nicer water tight aftermarket one.

 

Alright. I finally got the misfire problem mostly taken care of (it still misses a little now and then). The problem was that the spark plug spacing was too high. I'm still not out of the woods yet however as the car now has a overheating issue which seems to make the occasional miss worse. Tonight I'm going to replace the thermostat and see if that works. regardless ill be sure to let you all know the progress.

 

sounds like a bad hg to me.

 

hg?

 

head gasket

 

Ah. Yes that is one of the potential causes. The other main one is the radiator