streece

my truck is a 88 3.0 and it starts great cold and runs fine.....on a cold morning it starts in about a quarter turn. however when it gets warm and is shut off for a few minutes it has to crank longer to start...probably 10 seconds. i have checked a lot of common things such as fuel filter, air filter, plugs and wires, rotor cap and button, ect.... i have notice after it starts warm if i get out and go to the exhuast it smells very strong of gas..do you think that i could have one or more injectors leaking after they are warm? or what other ideas do you have? thanks.

streece

Nobody got an idea?

thook

It's possible.

There's a fellow around here on YT that seems to be real good at diagnosing injector issues. Don't remember his name offhand, but there's a thread he's been giving some input in. I'll try and find it, post his latest post for you (on injectors), and then I'd suggest you PM him.

thook

This is part of the dialogue in the said thread. Contact yota4runna. I've read a number of his posts in other threads about injector issues, and he seems to be on the ball about it. Learned a bit from, I did.

If no luck with him, try abecedarian or DeathCougar.

abecedarian

You may be having an issue with the cold start injector coming on during a warm start, flooding the engine. Next time you go for a warm start, before you do it disconnect the electrical connector to the cold start injector and see if it starts more easily. If it does, test the cold start time switch:
http://personal.utulsa.edu/~nathan-b...ne/97colds.pdf
(the guide is for a 93, but the 88 is similar enough)

thook

Well, there you are. Must've been distracted with them Freak'n'beans.

streece

thanks for the responses guys....i will give a try on the cold start injector, that sounds like a good canidate...and if not i'll try to pm him for some info...thanks again....i'll keep ya posted.

streece

well i checked the cold start injector....i pulled it out and cranked if over cold and it sprayed fuel....i put it back in started the truck and let it warm up to normal temp. then i let it set for about 20-25 minutes (that's when i get the hard starts) and pulled the cold start injector back out and cranked the engine over and no spray from it...so i think this eliminates it as a possiblity.

abecedarian

so to re-cap:
1) starts right up cold
2) takes ~10 seconds cranking to start when warmed
3) cold start injector sprays when the engine is cold
4) cold start injector does not spray when the engine has warmed
5) strong smell of fuel after warm starting

#1 suggests fuel pressure is not bleeding off- if it was going to bleed off, overnight night should be long enough
#3 also suggests fuel pressure is not bleeding off
#3, #4 suggest cold start injector and time switch are working properly
#5 indicates too much fuel being injected when warm

before tearing the injectors out and having them pattern and flow checked,
--check the throttle position sensor (this is intended primarilyfor the 22re, but there is a chart for the 3vze as well):
http://www.4crawler.com/4x4/CheapTri...#TPSAdjustment
--check and adjust the timing if necessary (with the engine running, short TE1 and E1 terminals in the diagnostic connector then adjust the distributor as necessary)
--check the coolant temp sensor (I don't have info for the 3VZE so maybe someone will chime in)
--check the air flow meter (again, I don't have infor for the 3VZE so maybe someone will chime in... hint, hint.... thook)

thook

Hehe.....there's a sticky for the '93 FSM on the front page, Abe....that covers this.

(Go ahead........smack me :0)

FSM guide for testing VAM...
http://personal.utulsa.edu/~nathan-b...33volumeai.pdf
Pay particular attention to the air temp sensor

Testing the coolant temp sensor...
http://personal.utulsa.edu/~nathan-b...40engineco.pdf
Resistance should drop evenly as coolant temp rises.

3vze TPS procedure.....
http://personal.utulsa.edu/~nathan-b...34throttle.pdf
Though, I don't think the TPS is faulty here.

abecedarian

I don't necessarily think it is either, but like I said, before pulling the intake apart check the things on the outside.

thook

Certainly never hurts...

streece

ok guys.....i'll try some of that stuff before i mess with the injectors....i sure appreciate everyones input and i will keep ya posted as i get a chance to work on things...thanks again

streece

ok....i have tested the vam with an ohm meter and it test per the fsm...so does the tps, coolant temp sens., but when i tested the coil per the fsm i could not get any reading on my meter....so does this mean that i may have a faulty or weak coil causing hard starting at warm temps?