1991 TR 4cyl Magna fuel injection

Hey, after taking my fuel rail and injectors off for a clean im getting a slight irregular check engine light it will go off on start up then a few seconds later it will turn on.

when i 1st turned it on after i cleaned them out it backfired twice and having a 3" exhaust it was so loud the police came over because a nabour thought it was gun fire.

Ill explain what steps i did this.
(I used a service manual)

1 unplugged Negative termin

2 unpluged all terminals in the fuel injection loom and moved them out the way.

3 left the pressure out of the fuel tank from taking the cap off.

4 took the air filter and tubing off to reach swews

5 unplugged the return fuel line off the fuel pressure regulator

6 unpluged the tube that goes to the air intake manfold

7 took the holding bolts off of the fuel rail,

8 unpluged the main fuel line and bottled fuel that was in the fuel rail.

9 taped over hoses for no leakage

10 took injectors out of engine while staying in the fuel rail

11 un-clipped retaining clips from injectors

12 removed the injectors

13 sprayed and cleaned them with carby cleaner, removed all deposits.

14 took the pressure regulator off and cleaned that out via spraying inside the holes "now that i think of it i sprayed in nozzle that heads to air intake(might be my issue might still have some deposits in there)" and let it drip out.

15 cleaned out injector holes on engine block with a tea towl and a blunt pole "Didnt go deap" there was alot of growny black shit in there (might have pushed it inside?)

16 sprayed the holes the injectors go onto the fuel rail with carby cleaner so i could reinsert the injectors in there (Lubed wasnt sure if you needed to replayed rubber o rings or)

17 placed the fuel pressure regulator black on lubing it with carby cleaner just to insert it.

18 re installed fuel rail with injectors and pressure regulators intact.

19 reinstalled wires. blots, negative terminal, etc.

20 attempt to turn on car turns over but then switches back off

21 re attempt this time starts up for about 10 seconds then turns off.

22 attempt 3 has accelerator folly down and turns the key it back fires once then turns right off repeats same thing and backfires again.

23 trys once more with out accelerator and it starts and stays on no engine light at this seconds engine running at probably 350 revs i pull the throttle to 3500 then it evens out to 800.

24 i let it run for two minutes checks the cluster and saw the engine light on.

25 went for a drive and has lost no power actually feels like it increased. but has a irregual jolt that you can feel in the car.

26 few hours later i do a rev staying at certain revpoints for about 30 seconds all the way up to 4000, it will decrease and you can hear a slight poping (kinda like the noise when you decelerate with a sports exhaust but not as loud.

27 still to go on another drive.


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Any one has any ideas? one injectors(piston 1) did look fairly brownly black(more then the others) "on the sprayer" side witch was the one that was sitting in piston 1 i moved it to 2 then the 2nd i moved to three, the 3rd i moved to 4th and 4th to 1st.

engine light turns on and off randomly and i random feel a slight jolt.

any one know what i did wrong?

"Whoa Daddy!"...Steve Buscemi, Fargo.

Mate let me go through a couple of tips for you.

Just a couple of small things to help you.

With fuel lines I usually push a short clean 8mm bolt into it and screw the clamp up just slightly.
Less chance of leakage.

"14 took the pressure regulator off and cleaned that out via spraying inside the holes "now that i think of it i sprayed in nozzle that heads to air intake(might be my issue might still have some deposits in there)" and let it drip out."

Not sure on that one Mate, there's a rubber diaphragm in there. I wouldn't spray solvent in there.

Injector holes are a bit like carby jets, We do not poke things in them.

Mate, carby cleaner is not a lubricant, its a solvent. And its not a good idea to spray it on O rings.

Rubber grease would be good, as a last resort, the tinniest smear of soap , dish liquid or silicone spray.



Cheers.

"Whoa Daddy!"...Steve Buscemi, Fargo.

Mate let me go through a couple of tips for you.

Just a couple of small things to help you.

With fuel lines I usually push a short clean 8mm bolt into it and screw the clamp up just slightly.
Less chance of leakage.

"14 took the pressure regulator off and cleaned that out via spraying inside the holes "now that i think of it i sprayed in nozzle that heads to air intake(might be my issue might still have some deposits in there)" and let it drip out."

Not sure on that one Mate, there's a rubber diaphragm in there. I wouldn't spray solvent in there.

Injector holes are a bit like carby jets, We do not poke things in them.

Mate, carby cleaner is not a lubricant, its a solvent. And its not a good idea to spray it on O rings.

Rubber grease would be good, as a last resort, the tinniest smear of soap , dish liquid or silicone spray.



Cheers.



thanx i know its not a lube but i had nothing and didnt know what to use.

its gone away for now just drove to castlemain last night just after this status and on the way back it was fine.

if it screws up again ill head to the wreakers and get the regulator off of there and see how to injectors are like.

im still learning you lern from your mistakes i guess

Yes we do learn from our mistakes but be carefull with mechanical stuff because a mistake may cost lots of dollars.

I seem to remember a test we used to do at BMW in the late '80's.
When the engine is hot and idling, unplug the vac hose from the reg and block the hose. Use a finger.
Listen for a change in idle.
The theory being that in high vac situations, as in cruising, the reg will open to drain off more fuel to the tank.
In full throttle conditions when more fuel is used, the reg will close up a bit so less fuel is drained back.

At least thats how I remember it.

The idle should faulter a bit if the reg is all right.

Cheers.

Yes we do learn from our mistakes but be carefull with mechanical stuff because a mistake may cost lots of dollars.

I seem to remember a test we used to do at BMW in the late '80's.
When the engine is hot and idling, unplug the vac hose from the reg and block the hose. Use a finger.
Listen for a change in idle.
The theory being that in high vac situations, as in cruising, the reg will open to drain off more fuel to the tank.
In full throttle conditions when more fuel is used, the reg will close up a bit so less fuel is drained back.

At least thats how I remember it.

The idle should faulter a bit if the reg is all right.

Cheers.

what would cause the engine to run rich if theres no noise and the injectors are new

ill try twhat you said as well

I've just had another think about this prob.

I think we need to go back to basics here.
Why did you take the injectors off in the first place?
What was the engine doing to cause you to do that?

Knowing what the engine was doing before the injector clean could be relevant to your prob now.