Motor swap problems need assistance

[monkey man]

The car is a 1984 jetta 4 door. Original motor unknown to me I did not do the swap. The current motor is from a 1988 scirocco it is a 1.8 8v c.I.s. no emissions equipment. It hesitates really bad until its just before it reaches normal operating temp. Just checked injectors they are not clogged and I'm replacing the o rings for the injectors as I'm posting this. Replaced the cap and rotor for distributor and put new NGK plugs in it. Now that I've been through that, I was thinking is the stock jetta injection control computer compatible with the scirocco motor. Or could it be the fuel pressure regulator.

Computer is a Bosch jetronic. And the motor may be a c.I.s-e but I'm not sure.

[oasis]

I can't answer your question but one thing that concerns me is you saying it is an '88 Scirocco engine that is an 8-valve engine. Sciroccos went to a 16-valve engine either at the start of or mid-year 1987. That makes me wonder if the engine you inherited may be some mix-and-match project that needs to be sorted.
_________________
Now: 2003 New Beetle Turbo S / 1990 Single Cab Transporter / 2014 Tiguan R-Line 4motion / 2013 Tiguan S / 2002 Golf GLS TDI
Past: 1974 Thing Acapulco / 2009 Eos Komfort / 1997 Jetta GT / 2002 Cabrio GLX / 2002 Passat GLS / 1971 Super Beetle / 1993 EuroVan MV Westfalia / 1981 Pickup LX / 1985 Vanagon / 1986 Jetta GLI

[monkey man]

The guy I bought it from told me that the guy he bought it from is the person who did the swap and it was said to be a 88 scirocco 8v.

But I do see what you mean it looks like a mk1 intake manifold. But it has some cis-e components on it and its been driving me insane trying to figure it out and it doesn'thelp that iI don't know exactly what the motor is.

[MrPapageorgio]

http://www.cabby-info.com/engine.htm

Maybe something in here will help You identify The motor......

[monkey man]

Has hydrolic lifters electronic distributor. The vacuum lines and the intake look like the ones in the 87-89 cis k jetronic diagram.
cant post pics now bad signal on my phone.

This is my first watercooled vw

[monkey man]

RD engine code

1781 I-4

81.0. Bore

86.4. Stroke

8V Hydraulic head

9.0:1. Compression

102@5250 horsepower

110@3250 torque

KE-Jetronic injection ( cis-e jetronic)


Now I'm not sure if the jetronic is right

[ps2375]

RD is 10:1 CR. And an 8V Scirocco spark box should be fine. Have you set the timing correctly and do you have a vacuum line hooked up to the spark box? Motor doesn't really care if you run it in CIS or CIS-e or MS. It just wants to be controlled correctly.

[monkey man]

Spark box ????????

My electronic distributor has vacuum lines on it. I don'thave any electronic parts that accept vacuum lines. Other than the vacuum sswitch and distributor.

I had the to.ing set at 6 degrees like the Manuel says but yesterday I change to 12 degrees and its low end is a lot better and the motor seems happier.

[ps2375]

CIS-e generally had a box for fuel and a box for spark and knock sensor. Those dist had no advance mechanism(s), as the "spark box" took care of that. If you have a dist with vacuum and mechanical advance, you don't need the spark box, but you should run premium fuel with the CR of the RD motor.

[monkey man]

Well thanks for your help guys.
She seems to be running better. As a quick side note is premium better for these VW's

[kamzcab86]

Your '84 Jetta originally had a 1.7L or 1.8L engine running CIS (basic or Lambda) in it. The RD is a 1.8L engine out of a Mk2-era Golf/Jetta, which used CIS-E. The previous owner of your car was misinformed; 1988 Sciroccos, as stated, used the 16V PL engine.

No matter; the car had an engine swap and you need to know which version of CIS it's using. This is the image from Cabby-Info that you need to study, particularly the bottom fuel distributor portion:

^That shows the differences between CIS and CIS-E distributors. If the car has CIS-Lambda, you'll want to go to http://www.cabby-info.com/cis.htm and do everything outlined and PDF'd on that page.
_________________
~Kamz
1986 Cabriolet: www.Cabby-Info.com
1990 Vanagon Westfalia: Old Blue's Blog
2016 Golf GTI S
"Real knowledge is to know the extent of one's ignorance." - 孔子

[ps2375]

Lambda can be run as Basic, if you don't power the freq valve, or hookup the O2 sensor, it's essentially the same as Basic.

And not all 1988 Scirocco's were 16V cars. But all 16V Sciroccos were CIS-e. I'm not sure what was on the 8V motors.

[monkey man]

It is a is lambda it has a black casing with a frequency valve. Now I also know what that connection is for on the harness by the o2 sensor its for testing the duty cycle.

Cis-e motor with cis lambda. I will retune my cis soon.
Can i just replace the oring on the idle air screw or do iI need to replace the screw as well.

[monkey man]

Now at 44.1 - 48.3 dwell on the duty cycle.

[ps2375]

Much easier to use a wiideband controller to set the mixture, then it should be set for ever. Others have also used the NB output to to lambda controller, and programmed the WB to run motor slightly rich for power. I never had much luck with that, so setting the mixture where I wanted it, it seemed to stay there from idle to redline on a 16V motor with no issues.

[monkey man]

All I have is my automotive meter. And it reads dwell for 4,6&8 cylinder cars.
Do Ihave to replace the idle air screw to get a new o-ring for it.

[kamzcab86]

[crsmp5]

Too bad that pic is cis lamba, not cis-e.... Cis-e has grey box on it like 16v.....
_________________
[url=http://cdn2.driiive.com/7037.jpg]Click to view image[/url]